diff --git a/.gitignore b/.gitignore
index 2f2a9d5..2b38e89 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,17 +1,17 @@
 # generic excluded patterns
 #
-# We sort the list below via: sort -u -f
+# We sort the list below via: sort -d -u
 #
-*,v
-*.BAK
-*.dSYM/
-*.exe
-*.o.tmp
-*.[oa]
 *~
-.*.swp
+*.BAK
 .DS_Store
 core*
+*.dSYM/
+*.exe
+*.[oa]
+*.o.tmp
+.*.swp
+*,v
 
 # files and directories created during the building of calc and other Makefile actions
 #
@@ -19,50 +19,51 @@ core*
 #	not consider development source.  Some other file(s) and/or programs
 #	generate these files.
 #
-# We sort the list below via: sort -u -f
+# We sort the list below via: sort -d -u
 #
-.dynamic
-.hsrc
-.static
+Makefile.our
+NOTES
 align32
 align32.h
 align32_tmp
 arc4random_tmp
 args.h
 cal/.all
-cal/test082.cal
 calc
-calc-static
 calc.1
+calc.cat1
 calc.spec
+calc-static
 calc.usage
+cal/test082.cal
 charbit.h
 chatbit
 chk_c
 conf.h
 const_tmp
-cscript/.all
 cscript/4dsphere
+cscript/README
+cscript/.all
 cscript/fproduct
 cscript/mersenne
 cscript/piforever
 cscript/plus
 cscript/powerterm
-cscript/README
 cscript/simple
 cscript/square
 custom/.all
 custom/libcustcalc*
 debug.out
+.dynamic
 endian
 endian_calc.h
 environ_tmp
 errcode
 errsym.h
+fpos_tmp
 fposval
 fposval.h
 fposval_tmp
-fpos_tmp
 func.show
 func.sort
 getpgid_tmp
@@ -127,6 +128,8 @@ have_urandom.h
 have_ustat
 have_ustat.h
 have_varvs
+help/COPYING
+help/COPYING-LGPL
 help/.all
 help/binding
 help/bindings
@@ -137,8 +140,6 @@ help/change
 help/changes
 help/contrib
 help/copy
-help/COPYING
-help/COPYING-LGPL
 help/cscript
 help/custom_cal
 help/errorcode
@@ -156,15 +157,14 @@ help/releases
 help/resource
 help/type
 help/usage
+.hsrc
 libcalc.*
 libcustcalc.*
 ll_tmp
 longbits
 longbits.h
-Makefile.our
 memmv_tmp
 newstr_tmp
-NOTES
 offscl_tmp
 outfile
 posscl_tmp
@@ -174,6 +174,7 @@ sample_many-static
 sample_rand
 sample_rand-static
 statfs_tmp
+.static
 status.chk_c.h
 strdup_tmp
 tags
diff --git a/CHANGES b/CHANGES
index 0ee69c9..ecfdacc 100644
--- a/CHANGES
+++ b/CHANGES
@@ -23,6 +23,45 @@ The following are the changes from calc version 2.15.0.3 to date:
     We now case the dest and src pointers to the proper type before
     referencing and performing the assignment.
 
+    Documented unexpected behavior when calc is running in
+    "shell script mode" and the prompt builtin function is used
+    without the -p flag.  Updated help/prompt, help/unexpected
+    and the calc man page accordingly.
+
+    Unless calc is given the -p command line option, calc will reopen
+    stdin as /dev/null instead of just closing stdin.  This prevents
+    subsequent opens grabbing the 1st file descriptor.
+
+    Disable regress tests 4709, 4710, and 7763 because they print
+    multi-byte sequences, which are just fine for calc, the awk
+    used to evaluate the regression suite output in some legacy
+    systems report a "multibyte conversion failure".
+
+    Added a number of missing Makefile variables to the "make env" rule.
+
+    The man command is used to format the calc.1 man page into calc.usage.
+
+    The "help calc" command now prints the formatted calc man page (calc.usage).
+    The "help man" command now prints the formatted calc man page (calc.usage).
+    The "help usage" command now prints the formatted calc man page (calc.usage).
+
+    The file, calc.cat1, is formed by gzipping the calc.usage
+    formatted man page.  The calc.cat1 is installed as the calc
+    cat section 1 man page.
+
+    Updated the Copyright string in version.c to refer to
+    the COPYING file and the "help copying" command.
+
+    Added calc.cat1 to .gitignore.  Using "sort -d -u" to sort .gitignore content.
+
+    Avoiding use of modern [[ and ]] in Makefile for those legacy systems
+    whose shell do not support them.  *sigh*
+
+    Fixed the order of "help full" to match the order of topics listed
+    buy the "help help" command.
+
+    Sorted the halias[] help topics table in help.c using sort -d -u.
+
 
 The following are the changes from calc version 2.15.0.1 to 2.15.0.2:
 
diff --git a/Makefile b/Makefile
index b12766d..5a4a44e 100644
--- a/Makefile
+++ b/Makefile
@@ -321,14 +321,17 @@ STATIC_FIRST_TARGETS= ${LICENSE} .static
 
 # late targets - things needed after the main build phase is complete
 #
-LATE_TARGETS= calc.1 calc.usage \
+LATE_TARGETS= calc.1 calc.usage calc.cat1 \
 	      cal/.all help/.all help/builtin help/errorcodes \
 	      cscript/.all
 
 # calc tools - tools used by the maintainers of the calc source base
 #
-# trailblank - find trailing blanks and other file format picky issues
-# update_ver - update version numbers in Makefile.config
+# Calc supplied tools:
+#
+# TRAILBLANK	- find trailing blanks and other file format picky issues
+# UPDATE_VER	- update version numbers in Makefile.config
+# CALC_TOOLS	- the complete list of calc supplied tools
 #
 TRAILBLANK= trailblank
 UPDATE_VER= update_ver
@@ -529,15 +532,19 @@ calc.1: calc.man ${MK_SET}
 	        -e 's,:\([/.~]\),:\\:\1,g' < calc.man > calc.1
 	${Q} echo calc.1 formed
 
-calc.usage: calc.1 ${MK_SET}
+calc.usage: calc.1
+	${Q} echo forming $@ from calc.1
 	${RM} -f $@
-	${Q} echo forming calc.usage from calc.1
-	${Q} if [ -z "${NROFF}" ]; then \
-	    LESSCHARSET=iso8859 ${CALCPAGER} calc.1; \
-	else \
-	    ${NROFF} -man calc.1; \
-	fi 2>&1 | ${GREP} -E -v 'cannot adjust line' | ${COL} -b > $@
-	${Q} echo calc.usage formed
+	${MAN} ./calc.1 > $@
+	${CHMOD} 0444 $@
+	${Q} echo $@ formed
+
+calc.cat1: calc.usage
+	${Q} echo forming $@ from calc.usage
+	${RM} -f $@
+	${GZIP} --best -f -c calc.usage > $@
+	${CHMOD} 0444 $@
+	${Q} echo $@ formed
 
 
 ##
@@ -563,7 +570,7 @@ sample_many${EXT}: sample_many.o ${CALC_DYNAMIC_LIBS} ${MK_SET}
 ###
 
 hist.o: hist.c ${MK_SET}
-	${CC} ${CFLAGS} ${TERMCONTROL} ${USE_READLINE} ${READLINE_INCLUDE} \
+	${CC} ${CFLAGS} -Wno-strict-prototypes ${TERMCONTROL} ${USE_READLINE} ${READLINE_INCLUDE} \
 	    -c hist.c
 
 seed.o: seed.c ${MK_SET}
@@ -2846,23 +2853,25 @@ env:
 	@echo 'BUILD_C_SRC=${BUILD_C_SRC}'; echo ''
 	@echo 'BUILD_H_SRC=${BUILD_H_SRC}'; echo ''
 	@echo 'BYTE_ORDER=${BYTE_ORDER}'; echo ''
+	@echo 'CALC_BYTE_ORDER=${CALC_BYTE_ORDER}'; echo ''
+	@echo 'CALC_CHARBIT=${CALC_CHARBIT}'; echo ''
+	@echo 'CALC_DYNAMIC_LIBS=${CALC_DYNAMIC_LIBS}'; echo ''
+	@echo 'CALC_ENV=${CALC_ENV}'; echo ''
+	@echo 'CALC_INCDIR=${CALC_INCDIR}'; echo ''
 	@echo 'CALCLIBLIST=${CALCLIBLIST}'; echo ''
 	@echo 'CALCOBJS=${CALCOBJS}'; echo ''
 	@echo 'CALCPAGER=${CALCPAGER}'; echo ''
 	@echo 'CALCPATH=${CALCPATH}'; echo ''
 	@echo 'CALCRC=${CALCRC}'; echo ''
-	@echo 'CALCSRC=${CALCSRC}'; echo ''
-	@echo 'CALC_DYNAMIC_LIBS=${CALC_DYNAMIC_LIBS}'; echo ''
-	@echo 'CALC_ENV=${CALC_ENV}'; echo ''
-	@echo 'CALC_INCDIR=${CALC_INCDIR}'; echo ''
 	@echo 'CALC_SHAREDIR=${CALC_SHAREDIR}'; echo ''
+	@echo 'CALCSRC=${CALCSRC}'; echo ''
 	@echo 'CALC_STATIC_LIBS=${CALC_STATIC_LIBS}'; echo ''
+	@echo 'CALC_TOOLS=${CALC_TOOLS}'; echo ''
 	@echo 'CAT=${CAT}'; echo ''
 	@echo 'CATDIR=${CATDIR}'; echo ''
 	@echo 'CATEXT=${CATEXT}'; echo ''
-	@echo 'CATMODE=${CATMODE}'; echo ''
-	@echo 'CC=${CC}'; echo ''
 	@echo 'CCBAN=${CCBAN}'; echo ''
+	@echo 'CC=${CC}'; echo ''
 	@echo 'CCMISC=${CCMISC}'; echo ''
 	@echo 'CCOPT=${CCOPT}'; echo ''
 	@echo 'CCWARN=${CCWARN}'; echo ''
@@ -2871,32 +2880,36 @@ env:
 	@echo 'CHMOD=${CHMOD}'; echo ''
 	@echo 'CMP=${CMP}'; echo ''
 	@echo 'CO=${CO}'; echo ''
-	@echo 'COL=${COL}'; echo ''
 	@echo 'COMMON_ADD=${COMMON_ADD}'; echo ''
 	@echo 'COMMON_CFLAGS=${COMMON_CFLAGS}'; echo ''
 	@echo 'COMMON_LDFLAGS=${COMMON_LDFLAGS}'; echo ''
 	@echo 'CONFIG_MKF=${CONFIG_MKF}'; echo ''
 	@echo 'CP=${CP}'; echo ''
 	@echo 'CSCRIPT_TARGETS=${CSCRIPT_TARGETS}'; echo ''
+	@echo 'C_SRC=${C_SRC}'; echo ''
 	@echo 'CTAGS=${CTAGS}'; echo ''
 	@echo 'CUSTOMCALDIR=${CUSTOMCALDIR}'; echo ''
 	@echo 'CUSTOMHELPDIR=${CUSTOMHELPDIR}'; echo ''
 	@echo 'CUSTOMINCDIR=${CUSTOMINCDIR}'; echo ''
-	@echo 'C_SRC=${C_SRC}'; echo ''
 	@echo 'DATE=${DATE}'; echo ''
 	@echo 'DEBUG=${DEBUG}'; echo ''
 	@echo 'DEFAULT_LIB_INSTALL_PATH=${DEFAULT_LIB_INSTALL_PATH}'; echo ''
 	@echo 'DEV_BITS=${DEV_BITS}'; echo ''
 	@echo 'DIFF=${DIFF}'; echo ''
 	@echo 'DISTLIST=${DISTLIST}'; echo ''
-	@echo 'E=${E}'; echo ''
+	@echo 'DYNAMIC_FIRST_TARGETS=${DYNAMIC_FIRST_TARGETS}'; echo ''
 	@echo 'EARLY_TARGETS=${EARLY_TARGETS}'; echo ''
+	@echo 'ECHON=${ECHON}'; echo ''
+	@echo 'E=${E}'; echo ''
 	@echo 'EXT=${EXT}'; echo ''
+	@echo 'EXTRA_CFLAGS=${EXTRA_CFLAGS}'; echo ''
+	@echo 'EXTRA_LDFLAGS=${EXTRA_LDFLAGS}'; echo ''
 	@echo 'FMT=${FMT}'; echo ''
 	@echo 'FPOS_BITS=${FPOS_BITS}'; echo ''
 	@echo 'FPOS_POS_BITS=${FPOS_POS_BITS}'; echo ''
+	@echo 'FSANITIZE=${FSANITIZE}'; echo ''
 	@echo 'GREP=${GREP}'; echo ''
-	@echo 'H=${H}'; echo ''
+	@echo 'GZIP=${GZIP}'; echo ''
 	@echo 'HAVE_ARC4RANDOM=${HAVE_ARC4RANDOM}'; echo ''
 	@echo 'HAVE_CONST=${HAVE_CONST}'; echo ''
 	@echo 'HAVE_ENVIRON=${HAVE_ENVIRON}'; echo ''
@@ -2924,11 +2937,11 @@ env:
 	@echo 'HAVE_STRLCPY=${HAVE_STRLCPY}'; echo ''
 	@echo 'HAVE_SYS_MOUNT_H=${HAVE_SYS_MOUNT_H}'; echo ''
 	@echo 'HAVE_SYS_PARAM_H=${HAVE_SYS_PARAM_H}'; echo ''
-	@echo 'HAVE_SYS_TIMES_H=${HAVE_SYS_TIMES_H}'; echo ''
 	@echo 'HAVE_SYS_TIME_H=${HAVE_SYS_TIME_H}'; echo ''
+	@echo 'HAVE_SYS_TIMES_H=${HAVE_SYS_TIMES_H}'; echo ''
 	@echo 'HAVE_SYS_VFS_H=${HAVE_SYS_VFS_H}'; echo ''
-	@echo 'HAVE_TIMES_H=${HAVE_TIMES_H}'; echo ''
 	@echo 'HAVE_TIME_H=${HAVE_TIME_H}'; echo ''
+	@echo 'HAVE_TIMES_H=${HAVE_TIMES_H}'; echo ''
 	@echo 'HAVE_UID_T=${HAVE_UID_T}'; echo ''
 	@echo 'HAVE_UNISTD_H=${HAVE_UNISTD_H}'; echo ''
 	@echo 'HAVE_UNUSED=${HAVE_UNUSED}'; echo ''
@@ -2936,6 +2949,7 @@ env:
 	@echo 'HAVE_USTAT=${HAVE_USTAT}'; echo ''
 	@echo 'HAVE_VSNPRINTF=${HAVE_VSNPRINTF}'; echo ''
 	@echo 'HELPDIR=${HELPDIR}'; echo ''
+	@echo 'H=${H}'; echo ''
 	@echo 'HOSTNAME=${HOSTNAME}'; echo ''
 	@echo 'H_SRC=${H_SRC}'; echo ''
 	@echo 'ICFLAGS=${ICFLAGS}'; echo ''
@@ -2946,46 +2960,48 @@ env:
 	@echo 'LATE_TARGETS=${LATE_TARGETS}'; echo ''
 	@echo 'LCC=${LCC}'; echo ''
 	@echo 'LDCONFIG=${LDCONFIG}'; echo ''
-	@echo 'LDFLAGS=${LDFLAGS}'; echo ''
 	@echo 'LD_DEBUG=${LD_DEBUG}'; echo ''
+	@echo 'LDFLAGS=${LDFLAGS}'; echo ''
 	@echo 'LD_SHARE=${LD_SHARE}'; echo ''
 	@echo 'LIBCALC_SHLIB=${LIBCALC_SHLIB}'; echo ''
 	@echo 'LIBCUSTCALC_SHLIB=${LIBCUSTCALC_SHLIB}'; echo ''
 	@echo 'LIBDIR=${LIBDIR}'; echo ''
+	@echo 'LIB_EXT=${LIB_EXT}'; echo ''
+	@echo 'LIB_EXT_VER=${LIB_EXT_VER}'; echo ''
+	@echo 'LIB_EXT_VERSION=${LIB_EXT_VERSION}'; echo ''
+	@echo 'LIB_H_SRC=${LIB_H_SRC}'; echo ''
 	@echo 'LIBOBJS=${LIBOBJS}'; echo ''
 	@echo 'LIBSRC=${LIBSRC}'; echo ''
-	@echo 'LIB_H_SRC=${LIB_H_SRC}'; echo ''
 	@echo 'LICENSE=${LICENSE}'; echo ''
 	@echo 'LN=${LN}'; echo ''
 	@echo 'LOCAL_MKF=${LOCAL_MKF}'; echo ''
 	@echo 'LONG_BITS=${LONG_BITS}'; echo ''
-	@echo 'MAKE=${MAKE}'; echo ''
+	@echo 'LS=${LS}'; echo ''
 	@echo 'MAKEDEPEND=${MAKEDEPEND}'; echo ''
 	@echo 'MAKE_FILE=${MAKE_FILE}'; echo ''
+	@echo 'MAKE=${MAKE}'; echo ''
+	@echo 'MAN=${MAN}'; echo ''
 	@echo 'MANDIR=${MANDIR}'; echo ''
 	@echo 'MANEXT=${MANEXT}'; echo ''
-	@echo 'MANMAKE=${MANMAKE}'; echo ''
-	@echo 'MANMODE=${MANMODE}'; echo ''
 	@echo 'MINGW=${MINGW}'; echo ''
 	@echo 'MKDIR=${MKDIR}'; echo ''
+	@echo 'MK_SET=${MK_SET}'; echo ''
 	@echo 'MV=${MV}'; echo ''
-	@echo 'NROFF=${NROFF}'; echo ''
-	@echo 'NROFF_ARG=${NROFF_ARG}'; echo ''
 	@echo 'OBJS=${OBJS}'; echo ''
 	@echo 'OFF_T_BITS=${OFF_T_BITS}'; echo ''
 	@echo 'OSNAME=${OSNAME}'; echo ''
+	@echo 'PHONY=${PHONY}'; echo ''
 	@echo 'PREFIX=${PREFIX}'; echo ''
 	@echo 'PURIFY=${PURIFY}'; echo ''
-	@echo 'PWD=${PWD}'; echo ''
 	@echo 'PWDCMD=${PWDCMD}'; echo ''
+	@echo 'PWD=${PWD}'; echo ''
 	@echo 'Q=${Q}'; echo ''
 	@echo 'RANLIB=${RANLIB}'; echo ''
 	@echo 'READLINE_EXTRAS=${READLINE_EXTRAS}'; echo ''
 	@echo 'READLINE_INCLUDE=${READLINE_INCLUDE}'; echo ''
 	@echo 'READLINE_LIB=${READLINE_LIB}'; echo ''
-	@echo 'RM=${RM}'; echo ''
 	@echo 'RMDIR=${RMDIR}'; echo ''
-	@echo 'S=${S}'; echo ''
+	@echo 'RM=${RM}'; echo ''
 	@echo 'SAMPLE_C_SRC=${SAMPLE_C_SRC}'; echo ''
 	@echo 'SAMPLE_H_SRC=${SAMPLE_H_SRC}'; echo ''
 	@echo 'SAMPLE_OBJ=${SAMPLE_OBJ}'; echo ''
@@ -2996,17 +3012,23 @@ env:
 	@echo 'SED=${SED}'; echo ''
 	@echo 'SHELL=${SHELL}'; echo ''
 	@echo 'SORT=${SORT}'; echo ''
-	@echo 'SPLINT=${SPLINT}'; echo ''
 	@echo 'SPLINT_OPTS=${SPLINT_OPTS}'; echo ''
+	@echo 'SPLINT=${SPLINT}'; echo ''
+	@echo 'S=${S}'; echo ''
+	@echo 'STATIC_FIRST_TARGETS=${STATIC_FIRST_TARGETS}'; echo ''
+	@echo 'STRIP=${STRIP}'; echo ''
 	@echo 'SYM_DYNAMIC_LIBS=${SYM_DYNAMIC_LIBS}'; echo ''
-	@echo 'T=${T}'; echo ''
-	@echo 'TARGETS=${TARGETS}'; echo ''
+	@echo 'TAIL=${TAIL}'; echo ''
 	@echo 'TARGET_MKF=${TARGET_MKF}'; echo ''
+	@echo 'TARGETS=${TARGETS}'; echo ''
 	@echo 'TEE=${TEE}'; echo ''
 	@echo 'TERMCONTROL=${TERMCONTROL}'; echo ''
 	@echo 'TOUCH=${TOUCH}'; echo ''
+	@echo 'TRAILBLANK=${TRAILBLANK}'; echo ''
 	@echo 'TRUE=${TRUE}'; echo ''
+	@echo 'T=${T}'; echo ''
 	@echo 'UNAME=${UNAME}'; echo ''
+	@echo 'UPDATE_VER=${UPDATE_VER}'; echo ''
 	@echo 'USE_READLINE=${USE_READLINE}'; echo ''
 	@echo 'UTIL_C_SRC=${UTIL_C_SRC}'; echo ''
 	@echo 'UTIL_FILES=${UTIL_FILES}'; echo ''
@@ -3014,8 +3036,9 @@ env:
 	@echo 'UTIL_OBJS=${UTIL_OBJS}'; echo ''
 	@echo 'UTIL_PROGS=${UTIL_PROGS}'; echo ''
 	@echo 'UTIL_TMP=${UTIL_TMP}'; echo ''
-	@echo 'V=${V}'; echo ''
 	@echo 'VERSION=${VERSION}'; echo ''
+	@echo 'VER=${VER}'; echo ''
+	@echo 'V=${V}'; echo ''
 	@echo 'WNO_ERROR_LONG_LONG=${WNO_ERROR_LONG_LONG}'; echo ''
 	@echo 'WNO_IMPLICT=${WNO_IMPLICT};' echo ''
 	@echo 'WNO_LONG_LONG=${WNO_LONG_LONG}'; echo ''
@@ -3201,9 +3224,9 @@ prep:
 	${Q}echo
 	${MAKE} -s depend
 	${Q}echo
-	@if [[ -f ${MAKE_FILE}.bak ]]; then echo ${MAKE_FILE}.bak exists 1>&2; exit 1; fi
-	@if [[ -f cscript/${MAKE_FILE}.bak ]]; then echo cscript/${MAKE_FILE}.bak exists 1>&2; exit 2; fi
-	@if [[ -f custom/${MAKE_FILE}.bak ]]; then echo custom/${MAKE_FILE}.bak exists 1>&2; exit 3; fi
+	@if [ -f ${MAKE_FILE}.bak ]; then echo ${MAKE_FILE}.bak exists 1>&2; exit 1; fi
+	@if [ -f cscript/${MAKE_FILE}.bak ]; then echo cscript/${MAKE_FILE}.bak exists 1>&2; exit 2; fi
+	@if [ -f custom/${MAKE_FILE}.bak ]; then echo custom/${MAKE_FILE}.bak exists 1>&2; exit 3; fi
 	${Q}echo '=-=-=-=-=-= end of ${MAKE} depend =-=-=-=-=-='
 	${Q}echo
 	${Q}echo '=-=-=-=-=-= start of ${MAKE} testfuncsort =-=-=-=-=-='
@@ -3415,7 +3438,7 @@ clobber: clean
 	${RM} -f *.u
 	${RM} -f libcalc.a
 	${RM} -f libcustcalc.a
-	${RM} -f calc.1 calc.usage
+	${RM} -f calc.1 calc.cat1
 	${RM} -f calc.pixie calc.rf calc.Counts calc.cord
 	${RM} -f gen_h Makefile.bak tmp.patch
 	${RM} -rf skel
@@ -3751,7 +3774,7 @@ install: ${LIB_H_SRC} ${BUILD_H_SRC} calc.1 all custom/Makefile
 		echo "removed old ${T}${CALC_INCDIR}/string.h"; \
 	    fi; \
 	done
-	-${Q} if [ -z "${MANDIR}" ]; then \
+	-${Q} if [ -z "${MANDIR}" || ! -s calc.1 ]; then \
 	    ${TRUE}; \
 	else \
 	    if ${CMP} -s calc.1 ${T}${MANDIR}/calc.${MANEXT}; then \
@@ -3765,24 +3788,17 @@ install: ${LIB_H_SRC} ${BUILD_H_SRC} calc.1 all custom/Makefile
 		echo "installed ${T}${MANDIR}/calc.${MANEXT}"; \
 	    fi; \
 	fi
-	-${Q} if [ -z "${CATDIR}" ]; then \
+	-${Q} if [ -z "${CATDIR}" || ! -s calc.cat1 ]; then \
 	    ${TRUE}; \
 	else \
-	    if ${CMP} -s calc.1 ${T}${MANDIR}/calc.${MANEXT}; then \
+	    if ${CMP} -s calc.cat1 ${T}${CATDIR}/calc.${MANEXT}; then \
 		${TRUE}; \
 	    else \
-		if [ -n "${NROFF}" ]; then \
-		    ${RM} -f ${T}${CATDIR}/calc.${CATEXT}.new; \
-		    ${NROFF} ${NROFF_ARG} calc.1 > \
-			     ${T}${CATDIR}/calc.${CATEXT}.new; \
-		    ${CHMOD} ${MANMODE} ${T}${MANDIR}/calc.${CATEXT}.new; \
-		    ${MV} -f ${T}${CATDIR}/calc.${CATEXT}.new \
-			  ${T}${CATDIR}/calc.${CATEXT}; \
-		    echo "installed ${T}${CATDIR}/calc.${CATEXT}"; \
-		elif [ -x "${MANNAME}" ]; then \
-		    echo "${MANMAKE} calc.1 ${T}${CATDIR}"; \
-		    ${MANMAKE} calc.1 ${T}${CATDIR}; \
-		fi; \
+		${RM} -f ${T}${CATDIR}/calc.${CATEXT}.new; \
+		${CP} -f calc.cat1 ${T}${CATDIR}/calc.${CATEXT}.new; \
+		${MV} -f ${T}${CATDIR}/calc.${CATEXT}.new \
+		         ${T}${CATDIR}/calc.${CATEXT}; \
+		echo "installed ${T}${CATDIR}/calc.${CATEXT}"; \
 	    fi; \
 	fi
 	${V} # NOTE: misc install cleanup
diff --git a/Makefile.config b/Makefile.config
index 3ed0949..101c227 100644
--- a/Makefile.config
+++ b/Makefile.config
@@ -997,9 +997,6 @@ endif	# ($(target),Darwin)
 #
 # Use CATDIR= to disable installation of the calc cat (formatted) page.
 #
-# NOTE: If CATDIR is non-empty, then one should have either the
-#	${NROFF} executable and/or the ${MANMAKE} executable.
-#
 CATDIR=
 #CATDIR= ${PREFIX}/man/cat1
 #CATDIR= ${PREFIX}/catman/cat1
@@ -1026,36 +1023,6 @@ CATEXT= 1
 #CATEXT= 0
 #CATEXT= l
 
-# how to format a man page
-#
-# If CATDIR is non-empty, then
-#
-#     If NROFF is non-empty, then
-#
-#	  ${NROFF} ${NROFF_ARG} calc.1 > ${CATDIR}/calc.${CATEXT}
-#		   is used to build and install the cat page
-#
-#     else (NROFF is empty)
-#
-#	  ${MANMAKE} calc.1 ${CATDIR}
-#		     is used to build and install the cat page
-# else
-#
-#     The cat page is not built or installed
-#
-# If in doubt and you don't want to fool with man pages, set MANDIR
-# and CATDIR to empty and ignore the NROFF, NROFF_ARG and MANMAKE
-# lines below.
-#
-#NROFF= nroff
-NROFF=
-#NROFF= groff
-NROFF_ARG= -man
-#NROFF_ARG= -mandoc
-MANMAKE= ${PREFIX}/bin/manmake
-#MANMAKE= manmake
-MANMODE= 0444
-CATMODE= 0444
 
 # By default, custom builtin functions may only be executed if calc
 # is given the -C option.  This is because custom builtin functions
@@ -1296,13 +1263,13 @@ CAT= cat
 CHMOD= chmod
 CMP= cmp
 CO= co
-COL= col
 CP= cp
 CTAGS= ctags
 DATE= date
 DIFF= diff
 FMT= fmt
 GREP= grep
+GZIP= gzip
 HOSTNAME= hostname
 LANG= C
 LDCONFIG= ldconfig
@@ -1310,6 +1277,7 @@ LN= ln
 LS= ls
 MAKE= make
 MAKEDEPEND= makedepend
+MAN= man
 MKDIR= mkdir
 MV= mv
 PWDCMD= pwd
@@ -1321,8 +1289,8 @@ SORT= sort
 SPLINT= splint
 SPLINT_OPTS=
 STRIP= strip
-TEE= tee
 TAIL= tail
+TEE= tee
 TOUCH= touch
 TRUE= true
 UNAME= uname
diff --git a/cal/regress.cal b/cal/regress.cal
index 18a7ecb..f966e3e 100644
--- a/cal/regress.cal
+++ b/cal/regress.cal
@@ -4879,8 +4879,9 @@ define test_charset()
 	vrfy("\123" == char(0123),	    '4706: "\\123" == char(0123)');
 	vrfy("\123\124" == "ST",	    '4707: "\\123\\124" == "ST"');
 	vrfy("\311" == char(201),	    '4708: "\\311" == char(201)');
-	vrfy("\119" == "\t9",		    '4709: "\\119" == "\t9"');
-	vrfy("\765" == "\365",		    '4710: "\\765" == "\365"');
+/* NOTE: We skip non-ASCII to avoid problems with old awk that cannot handle them */
+/*	vrfy("\119" == "\t9",		    '4709: "\\119" == "\t9"');		  */
+/*	vrfy("\765" == "\365",		    '4710: "\\765" == "\365"');		  */
 	vrfy("\x61" == "a",		    '4711: "\\x61" == "a"');
 	vrfy("\x73" == "s",		    '4712: "\\x73" == "s"');
 	vrfy("\xea" == char(234),	    '4713: "\\xea" == char(234)');
@@ -8191,7 +8192,8 @@ define test_newstring()
 	vrfy(A == "A\255gdef",		'7761: A == "A\\255gdef"');
 	setbit(A, 16, 0);
 	print				'7762: setbit(A, 16, 0);';
-	vrfy(A == "A\255fdef",		'7763: A == "A\255fdef"');
+/* NOTE: We skip non-ASCII to avoid problems with old awk that cannot handle them */
+/*	vrfy(A == "A\255fdef",		'7763: A == "A\255fdef"'); 		  */
 
 	q = "curds" " and " "whey";
 	print				'7764: q = "curds" " and " "whey"';
diff --git a/calc.c b/calc.c
index 7573f6d..af33ea1 100644
--- a/calc.c
+++ b/calc.c
@@ -543,8 +543,8 @@ main(int argc, char **argv)
 		cmdbuf[cmdlen++] = '\n';
 		cmdbuf[cmdlen] = '\0';
 		if (p_flag != true) {
-			if (fclose(stdin)) {
-				perror("main(): fclose(stdin) failed:");
+			if (freopen("/dev/null", "r", stdin) == NULL) {
+				perror("in main: freopen(\"/dev/null\", \"r\", stdin) failed:");
 			}
 			stdin_closed = true;
 		}
diff --git a/calc.man b/calc.man
index 5775ebe..caaec90 100644
--- a/calc.man
+++ b/calc.man
@@ -470,6 +470,24 @@ The
 flag overrides
 .BR \-i .
 
+.sp 1
+When running calc as a shell script (see
+.B "SHELL SCRIPT MODE"
+for details), calc will close standard input (stdin)
+during startup
+.B UNLESS
+the
+.B \-p
+flag is given on the command line.
+When calc is running in
+.BR "shell script mode" ,
+shell scripts that call the
+.BR prompt (str)
+builtin will not work properly (the prompt builtin
+will always fail) unless the
+.B \-p
+flag is given on the command line.
+
 .TP
 .B \-q
 Disable the reading of the startup scripts.
@@ -651,7 +669,9 @@ echo chongo was here | calc \-i 'print fgetline(files(0));'
 .fi
 .in -5n
 .sp 1
-This is because without \-p, the interactive parser, in an effort
+This is because without
+.BR \-p ,
+the interactive parser, in an effort
 to parse interactive commands, flushes data on standard input.
 
 .PP
@@ -932,6 +952,67 @@ whereas
 .sp 1
 will not.
 
+.sp 1
+By default, using calc startup in
+.BR "shell script mode" ,
+calc will close standard input (stdin).
+Thus builtin functions such as
+.BR prompt (str)
+will fail (return a null value).
+Calc shell scripts that call the
+.BR prompt (str)
+builtin will not work properly (the prompt builtin
+will always fail and return a null value) unless the
+.B \-p
+flag is given on the command line.
+
+.sp 1
+The following shell script will always print "got null" because
+stdin will be closed by calc during startup:
+
+.sp 1
+.in +5n
+.nf
+#!/usr/bin/calc \-q \-f
+
+# The prompt will ALWAYS FAIL and return a null value
+n = prompt("Test> ");
+if (isnull(n)) {
+  print("got null");
+} else {
+  print("got " + n);
+}
+.fi
+.in -5n
+.sp 1
+However the following shell script (note the
+.B \-p
+before the
+.B \-f
+in the 1st line) will be interactive, prompt with "Test> " and print
+the "got" result as expected:
+
+.sp 1
+.in +5n
+.nf
+#!/usr/bin/calc \-q \-p \-f
+
+n = prompt("Test> ");
+if (isnull(n)) {
+  print("got null");
+} else {
+  print("got " + n);
+}
+.fi
+.in -5n
+
+.sp 1
+Note in the example above, the
+.B \-p
+flag must be given before the final
+.B \-f
+command line flag.
+
 .PP
 
 .SH DATA TYPES
diff --git a/help.c b/help.c
index 0a48f2b..7c53fbf 100644
--- a/help.c
+++ b/help.c
@@ -56,38 +56,41 @@ STATIC struct help_alias {
 	char *topic;
 	char *filename;
 } halias[] = {
+	/* We sort the list below via: sort -d -u */
 	{"=", "address"},
 	{"->", "arrow"},
 	{"=", "assign"},
 	{"*", "dereference"},
-	{".", "oldvalue"},
 	{"%", "mod"},
-	{"//", "quo"},
+	{".", "oldvalue"},
 	{"#", "pound"},
-	{"calc", "help"},
+	{"//", "quo"},
+	{"COPYING_LGPL", "COPYING-LGPL"},
+	{"COPYLEFT", "copyright"},
+	{"COPYRIGHT", "copyright"},
+	{"Copyleft", "copyright"},
+	{"Copyright", "copyright"},
+	{"abort", "command"},
+	{"cd", "command"},
 	{"copy", "blkcpy"},
 	{"copying", "COPYING"},
 	{"copying-lgpl", "COPYING-LGPL"},
-	{"copying_lgpl", "COPYING-LGPL"},
-	{"COPYING_LGPL", "COPYING-LGPL"},
-	{"Copyright", "copyright"},
-	{"COPYRIGHT", "copyright"},
-	{"Copyleft", "copyright"},
-	{"COPYLEFT", "copyright"},
 	{"define", "command"},
-	{"read", "command"},
-	{"write", "command"},
-	{"quit", "command"},
-	{"exit", "command"},
-	{"abort", "command"},
-	{"cd", "command"},
-	{"show", "command"},
-	{"stdlib", "resource"},
-	{"question", "questions"},
 	{"dm2d", "dms2d"},
+	{"exit", "command"},
 	{"gm2g", "gms2g"},
 	{"hm2d", "hms2d"},
+	{"man", "calc"},
+	{"question", "questions"},
+	{"quit", "command"},
+	{"read", "command"},
 	{"release", "releases"},
+	{"show", "command"},
+	{"stdlib", "resource"},
+	{"usage", "calc"},
+	{"write", "command"},
+
+	/* MUST BE LAST! */
 	{NULL, NULL}
 };
 
diff --git a/help/Makefile b/help/Makefile
index 28d65f3..40f2517 100644
--- a/help/Makefile
+++ b/help/Makefile
@@ -118,76 +118,62 @@ V=@:
 # Files managed by this Makefile #
 ##################################
 
-STD_HELP_FILES_1= intro overview help
+STD_HELP_FILES_1= intro overview calc
+
 STD_HELP_FILES_2= assoc
-
-BLT_HELP_FILES_3= builtin man
-
-STD_HELP_FILES_4= command config custom define environment expression
-
+BLT_HELP_FILES_3= builtin
+STD_HELP_FILES_4= command config custom define environment
 BLT_HELP_FILES_5= errorcodes
-
-STD_HELP_FILES_6= file history interrupt list mat
-
+STD_HELP_FILES_6= expression file history interrupt list mat
 # because obj is built special (due to confusion with it as
 # a symlink for some built environments, we treat obj specially
 # and call it obj.file
 #
 SPECIAL_HELP_7= obj.file
-
-STD_HELP_FILES_8= operator statement
-
+STD_HELP_FILES_8= operator
 BLT_HELP_FILES_9= resource
+STD_HELP_FILES_10= script statement types unexpected variable
 
-STD_HELP_FILES_10= types script
-
-BLT_HELP_FILES_10a= usage cscript
-
-STD_HELP_FILES_10b= unexpected variable
-
-BLT_HELP_FILES_11= bindings custom_cal libcalc new_custom resource
+BLT_HELP_FILES_11= bindings custom_cal libcalc new_custom cscript
 
 STD_HELP_FILES_12= archive
+BLT_HELP_FILES_13= bugs changes contrib
+STD_HELP_FILES_14= todo wishlist
 
-BLT_HELP_FILES_13= bugs changes
+STD_HELP_FILES_15= credit
+# copyright is printed by help.c is from the Copyright string found in version.c
+BLT_HELP_FILES_16= COPYING COPYING-LGPL questions releases
 
-STD_HELP_FILES_14= credit
-
-BLT_HELP_FILES_14= contrib COPYING COPYING-LGPL questions releases
-
-STD_HELP_FILES_15= wishlist todo
+STD_HELP_FILES_17= help
 
 # These files are used in the following order to construct full
 #
-FULL_HELP_FILES= ${STD_HELP_FILES_1} ${STD_HELP_FILES_2} \
-		${BLT_HELP_FILES_3} ${STD_HELP_FILES_4} \
-		${BLT_HELP_FILES_5} ${STD_HELP_FILES_6} \
-		${SPECIAL_HELP_7} ${STD_HELP_FILES_8} \
-		${BLT_HELP_FILES_9} ${STD_HELP_FILES_10} \
-		${BLT_HELP_FILES_10a} ${STD_HELP_FILES_10b} \
-		${BLT_HELP_FILES_11} ${STD_HELP_FILES_12} \
-		${BLT_HELP_FILES_13} ${STD_HELP_FILES_14} \
-		${BLT_HELP_FILES_14} ${STD_HELP_FILES_15}
+FULL_HELP_FILES= ${STD_HELP_FILES_1}  ${STD_HELP_FILES_2} \
+		 ${BLT_HELP_FILES_3}  ${STD_HELP_FILES_4} \
+		 ${BLT_HELP_FILES_5}  ${STD_HELP_FILES_6} \
+		 ${SPECIAL_HELP_7}    ${STD_HELP_FILES_8} \
+		 ${BLT_HELP_FILES_9}  ${STD_HELP_FILES_10} \
+		 ${BLT_HELP_FILES_11} ${STD_HELP_FILES_12} \
+		 ${BLT_HELP_FILES_13} ${STD_HELP_FILES_14} \
+		 ${STD_HELP_FILES_15} ${BLT_HELP_FILES_16} \
+		 ${STD_HELP_FILES_17}
 
 # These full files are those who are not built or constructed
 #
-STD_HELP_FILES= ${STD_HELP_FILES_1} ${STD_HELP_FILES_2} \
-		${STD_HELP_FILES_4} ${STD_HELP_FILES_6} \
-		${STD_HELP_FILES_8} ${STD_HELP_FILES_10} \
-		${STD_HELP_FILES_10b} \
+STD_HELP_FILES= ${STD_HELP_FILES_1}  ${STD_HELP_FILES_2} \
+		${STD_HELP_FILES_4}  ${STD_HELP_FILES_6} \
+		${STD_HELP_FILES_8}  ${STD_HELP_FILES_10} \
 		${STD_HELP_FILES_12} ${STD_HELP_FILES_14} \
-		${STD_HELP_FILES_15}
+		${STD_HELP_FILES_15} ${STD_HELP_FILES_17}
 
 # These full files are those who are built by this Makefile
 #
 # Note that ${SPECIAL_HELP_7} is not included in this list
 # because of problems with its name.
 #
-BLT_HELP_FILES= ${BLT_HELP_FILES_3} ${BLT_HELP_FILES_5} \
-		${BLT_HELP_FILES_9} \
-		${BLT_HELP_FILES_10a} \
-		${BLT_HELP_FILES_11} ${BLT_HELP_FILES_13} \
-		${BLT_HELP_FILES_14}
+BLT_HELP_FILES= ${BLT_HELP_FILES_3}  ${BLT_HELP_FILES_5} \
+		${BLT_HELP_FILES_9}  ${BLT_HELP_FILES_11} \
+		${BLT_HELP_FILES_13} ${BLT_HELP_FILES_16}
 
 # The detailed list of help files to install
 #
@@ -382,7 +368,7 @@ errorcodes: ../errcode${EXT}
 	    ${TRUE}; \
 	fi
 
-usage: ../calc.usage
+calc: ../calc.usage
 	${RM} -f $@
 	${CP} ../calc.usage $@
 	${CHMOD} 0444 $@
@@ -433,18 +419,6 @@ copy: blkcpy
 	    ${TRUE}; \
 	fi
 
-man: help
-	${RM} -f $@
-	${CP} help $@
-	${CHMOD} 0444 $@
-	-@if [ -z "${Q}" ]; then \
-	    echo ''; \
-	    echo '=-=-= skipping the ${CAT} of help/$@ =-=-='; \
-	    echo ''; \
-	else \
-	    ${TRUE}; \
-	fi
-
 COPYING: ../COPYING
 	${RM} -f $@
 	${CP} ../COPYING $@
diff --git a/help/help b/help/help
index b9bdb09..2e23bf9 100644
--- a/help/help
+++ b/help/help
@@ -5,7 +5,7 @@ following topics:
     -----		-----------
     intro		introduction to calc
     overview		overview of calc
-    help		this file
+    calc		calc man page, how to invoke the calc command
 
     assoc		using associations
     builtin		builtin functions
@@ -23,18 +23,17 @@ following topics:
     mat			using matrices
     obj			user defined data types
     operator		math, relational, logic and variable access operators
+    resource		standard calc resource files
+    script		using calc shell scripts
     statement		flow control and declaration statements
     types		builtin data types
     unexpected		unexpected syntax/usage surprises for C programmers
-    usage		how to invoke the calc command
     variable		variables and variable declarations
 
     bindings		input & history character bindings
     custom_cal		information about custom calc resource files
     libcalc		using the arbitrary precision routines in a C program
     new_custom		information about how to add new custom functions
-    resource		standard calc resource files
-    script		using calc shell scripts
     cscript		info on the calc shell scripts supplied with calc
 
     archive		where to get the latest versions of calc
@@ -51,6 +50,7 @@ following topics:
     questions		how to ask simple general question about calc
     release		on calc versions and releases
 
+    help		this file
     full		all of the above (in the above order)
 
 For example:
diff --git a/help/prompt b/help/prompt
index d94d3da..e759de8 100644
--- a/help/prompt
+++ b/help/prompt
@@ -10,10 +10,43 @@ TYPES
     return	string
 
 DESCRIPTION
-   When prompt(str) is called and input is from a terminal, the string
-   str is displayed and execution is halted until a newline ends a line
-   read from the input; the string formed by the characters in the line
-   (other than the newline) is returned as the value of prompt().
+    When prompt(str) is called and input is from a terminal, the string
+    str is displayed and execution is halted until a newline ends a line
+    read from the input; the string formed by the characters in the line
+    (other than the newline) is returned as the value of prompt().
+
+    Be careful when using prompt(str) while calc is being used as a
+    shell script.  Unless calc is run with the -p command line option,
+    the prompt builtin will fail and return null.  This is because when
+    calc is running as a shell script, calc will close stdin run in in
+    a non-interactive mode.
+
+    The following shell script will always print "got null" because
+    stdin will be closed by calc during startup:
+
+	#!/usr/bin/calc -q -f
+
+	# The prompt will ALWAYS FAIL and return a null value
+	n = prompt("Test> ");
+	if (isnull(n)) {
+	  print("got null");
+	} else {
+	  print("got " + n);
+	}
+
+     However the following shell script (note the -p before the -f in
+     the 1st line) will be interactive, prompt with "Test> " and print
+     the "got" result as expected:
+
+	#!/usr/bin/calc -q -p -f
+
+	n = prompt("Test> ");
+	if (isnull(n)) {
+	  print("got null");
+	} else {
+	  print("got " + n);
+	}
+
 
 EXAMPLE
     ; x = prompt("? ");
@@ -35,9 +68,9 @@ LINK LIBRARY
     none
 
 SEE ALSO
-    fgetfield, fgetline, fgetstr
+    command, fgetfield, fgetline, fgetstr, unexpected
 
-## Copyright (C) 1999-2006  Landon Curt Noll
+## Copyright (C) 1999,2023  Landon Curt Noll
 ##
 ## Calc is open software; you can redistribute it and/or modify it under
 ## the terms of the version 2.1 of the GNU Lesser General Public License
diff --git a/help/unexpected b/help/unexpected
index 6346103..cbfee04 100644
--- a/help/unexpected
+++ b/help/unexpected
@@ -563,6 +563,7 @@ Unexpected
 	; print sin(d2r(30))
 	0.5
 
+
     * operator has has a higher precedence than <<
     ==============================================
 
@@ -570,6 +571,49 @@ Unexpected
     So 3 << 2*5 evaluates to 3072 in C, whereas 3 << 2*5 evaluates to 60 in calc.
 
 
+    prompt builtin returns null in calc shell scripts unless -p is used
+    ===================================================================
+
+    Be careful when using prompt(str) while calc is being used as a
+    shell script.  Unless calc is run with the -p command line option,
+    the prompt builtin will fail and return null.  This is because when
+    calc is running as a shell script, calc will close stdin run in in
+    a non-interactive mode.
+
+    The following shell script will always print "got null" because
+    stdin will be closed by calc during startup:
+
+	#!/usr/bin/calc -q -f
+
+	n = prompt("Test> ");
+	if (isnull(n)) {
+	  print("got null");
+	} else {
+	  print("got " + n);
+	}
+
+     However the following shell script (note the -p before the -f in
+     the 1st line) will be interactive, prompt with "Test> " and print
+     the "got" result as expected:
+
+	#!/usr/bin/calc -q -p -f
+
+	n = prompt("Test> ");
+	if (isnull(n)) {
+	  print("got null");
+	} else {
+	  print("got " + n);
+	}
+
+    Note in the example above, the -p flag must be given before the
+    final -f command line flag.
+
+    A similar problem will occur if the calc shell script attempts
+    to read from standard input (stdin), unless the -p flag is used.
+
+    See "SHELL SCRIPT MODE" in the calc man page for more information
+    about -p and about the "shell script mode".
+
 ## Copyright (C) 1999-2007,2014,2017,2021,2023  Landon Curt Noll
 ##
 ## Calc is open software; you can redistribute it and/or modify it under
diff --git a/version.c b/version.c
index a7c3e3b..98464b1 100644
--- a/version.c
+++ b/version.c
@@ -80,7 +80,13 @@ char *Copyright = "\n"
   "\n"
   "Calc is open software; you can redistribute it and/or modify it under\n"
   "the terms of the version 2.1 of the GNU Lesser General Public License\n"
-  "as published by the Free Software Foundation.\n";
+  "as published by the Free Software Foundation.\n"
+  "\n"
+  "Please see the file COPYING, or use the calc command:\n"
+  "\n"
+  "\thelp copying\n"
+  "\n"
+  "for important copyright and license information!\n";
 char *Usability = "\n"
   "Calc is distributed in the hope that it will be useful, but WITHOUT\n"
   "ANY WARRANTY; without even the implied warranty of MERCHANTABILITY\n"