diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..503bb91
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,3 @@
+# Ignore intermediate binary files generated by the compiler process
+obj/*.o
+obj/*.ppu
diff --git a/Makefile b/Makefile
new file mode 100644
index 0000000..e646c6a
--- /dev/null
+++ b/Makefile
@@ -0,0 +1,76 @@
+# Makefile for Mizar 
+
+# Target for installation
+DESTDIR=/usr/local/bin
+SYS=POSIX
+
+# Directory for sources
+MIZSRC=.
+
+# Directories for binaries
+FPCBIN=bin
+
+# Directories for object and unit files
+FPCOBJ=obj
+
+# Path to Mizar units
+MIZ_UNITS =base kernel usrtools libtools addtools 
+
+# Compilers
+FPC = fpc -Sdg -FE$(FPCBIN) -FU$(FPCOBJ) \
+	$(addprefix -Fu$(MIZSRC)/,$(MIZ_UNITS)) 
+
+FPCFLAGS =
+#FPCFLAGS = -g -gc -gg -pg 
+
+ADDDPR = $(wildcard $(MIZSRC)/addtools/*.dpr)
+
+BASEDPR = $(wildcard $(MIZSRC)/base/*.dpr)
+
+KERNELDPR = $(wildcard $(MIZSRC)/kernel/*.dpr)
+
+LIBDPR = $(wildcard $(MIZSRC)/libtools/*.dpr)
+
+USRDPR = $(wildcard $(MIZSRC)/usrtools/*.dpr)
+
+ADD_EXE = $(basename $(ADDDPR))
+BASE_EXE = $(basename $(BASEDPR))
+KERNEL_EXE = $(basename $(KERNELDPR))
+LIB_EXE = $(basename $(LIBDPR))
+USR_EXE = $(basename $(USRDPR))
+
+.PHONY: all
+all: dirs fpc_base fpc_kernel fpc_add fpc_lib fpc_usr
+
+clean: fpc_clean
+fpc_clean: fpc_obj_clean fpc_bin_clean
+
+dirs:
+	mkdir -p $(FPCBIN) $(FPCOBJ)
+
+fpc_base: $(addprefix $(FPCBIN)/,$(BASE_EXE))
+fpc_kernel: $(addprefix $(FPCBIN)/,$(KERNEL_EXE))
+fpc_add: $(addprefix $(FPCBIN)/,$(ADD_EXE))
+fpc_lib: $(addprefix $(FPCBIN)/,$(LIB_EXE))
+fpc_usr: $(addprefix $(FPCBIN)/,$(USR_EXE))
+
+fpc_obj_clean:
+	rm -r -f $(FPCOBJ)/*
+fpc_bin_clean:
+	rm -r -f $(FPCBIN)/*
+
+# Rules for FPC
+$(addprefix $(FPCBIN)/,$(BASE_EXE)): 
+	$(FPC) $(FPCFLAGS) $(MIZSRC)/base/$(basename $(@F)).dpr
+$(addprefix $(FPCBIN)/,$(KERNEL_EXE)): 
+	$(FPC) $(FPCFLAGS) $(MIZSRC)/kernel/$(basename $(@F)).dpr
+$(addprefix $(FPCBIN)/,$(ADD_EXE)): 
+	$(FPC) $(FPCFLAGS) $(MIZSRC)/addtools/$(basename $(@F)).dpr
+$(addprefix $(FPCBIN)/,$(filter-out $(SPECIAL_LIB),$(LIB_EXE))): 
+	$(FPC) $(FPCFLAGS) $(MIZSRC)/libtools/$(basename $(@F)).dpr
+$(addprefix $(FPCBIN)/,$(USR_EXE)): 
+	$(FPC) $(FPCFLAGS) $(MIZSRC)/usrtools/$(basename $(@F)).dpr
+
+install:
+	cp bin/* $(DESTDIR)/
+	cp scripts/$(SYS)/* $(DESTDIR)/
diff --git a/bin/.gitignore b/bin/.gitignore
new file mode 100644
index 0000000..1aff4ce
--- /dev/null
+++ b/bin/.gitignore
@@ -0,0 +1,4 @@
+# Ignore everything in this directory
+*
+# ...except for this file
+!.gitignore
\ No newline at end of file
diff --git a/obj/.gitignore b/obj/.gitignore
new file mode 100644
index 0000000..1aff4ce
--- /dev/null
+++ b/obj/.gitignore
@@ -0,0 +1,4 @@
+# Ignore everything in this directory
+*
+# ...except for this file
+!.gitignore
\ No newline at end of file
diff --git a/scripts/POSIX/miz2abs b/scripts/POSIX/miz2abs
new file mode 100755
index 0000000..b3f2e9a
--- /dev/null
+++ b/scripts/POSIX/miz2abs
@@ -0,0 +1,34 @@
+#!/bin/sh
+#   
+#          Mizar Abstractor, example shell command
+#
+
+accommodate()
+{
+ accom $1
+ if test "$?" = "0"
+  then
+   make_abstract $1
+  else
+   errflag $1
+   addfmsg $1 $MIZFILES/mizar
+   exit 2
+ fi
+}
+
+make_abstract()
+{
+ absedt $1
+ edtfile $1
+ mv $1.'$-$' $1.abs
+}
+
+if test -z "$1" 
+ then 
+  echo "> `basename $0` error : Missing parameter" 
+  echo "Usage: `basename $0` mizar_article_name" 
+  exit 1
+ else 
+  accommodate "`dirname $1`/`basename $1 .miz`"
+fi
+
diff --git a/scripts/POSIX/miz2prel b/scripts/POSIX/miz2prel
new file mode 100755
index 0000000..bed184e
--- /dev/null
+++ b/scripts/POSIX/miz2prel
@@ -0,0 +1,52 @@
+#!/bin/sh
+#
+#          Mizar local data base creation, example shell command
+#
+
+accommodate()
+{
+ accom $1
+ if test "$?" = "0"
+  then
+   exporting $1
+  else
+   errflag $1
+   addfmsg $1 $MIZFILES/mizar
+   exit 2
+ fi
+}
+
+exporting()
+{
+ exporter $1
+ if test "$?" = "0"
+  then
+   make_prel $1
+  else
+   errflag $1
+   addfmsg $1 $MIZFILES/mizar
+   exit 3
+ fi
+}
+
+make_prel()
+{
+ transfer $1
+ for ext in dno dcl dco def the sch
+ do
+  if test -f "$1.$ext"
+   then
+    rm "$1.$ext" 
+  fi
+ done
+ echo "Local data base created"
+}
+
+if test -z "$1"
+ then
+  echo "> `basename $0` error : Missing parameter" 
+  echo "Usage: `basename $0` mizar_article_name" 
+  exit 1
+ else 
+  accommodate "`dirname $1`/`basename $1 .miz`"
+fi
diff --git a/scripts/POSIX/mizf b/scripts/POSIX/mizf
new file mode 100755
index 0000000..0876de0
--- /dev/null
+++ b/scripts/POSIX/mizf
@@ -0,0 +1,42 @@
+#!/bin/sh
+#
+#          Mizar Verifier, example shell command
+#
+
+accommodate()
+{
+ makeenv $1
+ if [ "$?" = "0" ]
+  then
+   verify $1
+  else
+   errflag $1
+   addfmsg $1 $MIZFILES/mizar
+   exit 2
+ fi
+}
+
+verify()
+{
+ verifier $1
+ errflag $1
+ addfmsg $1 $MIZFILES/mizar
+}
+
+if [ -z "$1" ]
+ then 
+  echo "> `basename $0` error : Missing parameter" 
+  echo "Usage: `basename $0` mizar_article_name" 
+  if [ -n "$MIZFILES" ]
+   then 
+    MizarReleaseNbr=`awk -F= '/MizarReleaseNbr/{print $2}' $MIZFILES/mml.ini`
+    MizarVersionNbr=`awk -F= '/MizarVersionNbr/{print $2}' $MIZFILES/mml.ini`
+    MizarVariantNbr=`awk -F= '/MizarVariantNbr/{print $2}' $MIZFILES/mml.ini`
+    MMLVersion=`awk -F= '/MMLVersion/{print $2}' $MIZFILES/mml.ini`
+    NumberOfArticles=`awk -F= '/NumberOfArticles/{print $2}' $MIZFILES/mml.ini`
+    echo "MML ver. $MMLVersion.$NumberOfArticles for Mizar ver. $MizarReleaseNbr.$MizarVersionNbr.$MizarVariantNbr available in $MIZFILES"
+  fi
+  exit 1
+ else 
+  accommodate "`dirname $1`/`basename $1 .miz`"
+fi
diff --git a/scripts/POSIX/revedt b/scripts/POSIX/revedt
new file mode 100755
index 0000000..f4fa8eb
--- /dev/null
+++ b/scripts/POSIX/revedt
@@ -0,0 +1,34 @@
+#!/bin/sh
+#
+#          Mizar editing utilities, example shell command
+#
+
+accommodate()
+{
+ makeenv $1
+ if test "$?" = "0"
+  then
+   verify $1
+  else
+   errflag $1
+   addfmsg $1 $MIZFILES/mizar
+   exit 2
+ fi
+}
+
+verify()
+{
+ $VERIFIER $1
+ edtfile $1
+ cp $1.'$-$' $1.miz
+}
+
+if test -z "$1" -o -z "$2"
+ then 
+  echo "> `basename $0` error : Missing parameter" 
+  echo "Usage: `basename $0` mizar_utility_name mizar_article_name" 
+  exit 1
+ else 
+  VERIFIER=$1
+  accommodate "`dirname $2`/`basename $2 .miz`"
+fi
diff --git a/scripts/POSIX/revf b/scripts/POSIX/revf
new file mode 100755
index 0000000..0c03896
--- /dev/null
+++ b/scripts/POSIX/revf
@@ -0,0 +1,34 @@
+#!/bin/sh
+#
+#          Mizar utilities, example shell command
+#
+
+accommodate()
+{
+ makeenv $1
+ if test "$?" = "0"
+  then
+   verify $1
+  else
+   errflag $1
+   addfmsg $1 $MIZFILES/mizar
+   exit 2
+ fi
+}
+
+verify()
+{
+ $VERIFIER $1
+ errflag $1
+ addfmsg $1 $MIZFILES/mizar
+}
+
+if test -z "$1" -o -z "$2"
+ then 
+  echo "> `basename $0` error : Missing parameter" 
+  echo "Usage: `basename $0` mizar_utility_name mizar_article_name" 
+  exit 1
+ else 
+  VERIFIER=$1
+  accommodate "`dirname $2`/`basename $2 .miz`"
+fi
diff --git a/scripts/WINDOWS/clrenv.bat b/scripts/WINDOWS/clrenv.bat
new file mode 100644
index 0000000..07ea531
--- /dev/null
+++ b/scripts/WINDOWS/clrenv.bat
@@ -0,0 +1,73 @@
+@echo off
+:;
+:; The batch file for cleaning environment declaration.
+:; Enter the filename without an extension. The article
+:; should report no errors. The list of removed identifiers
+:; is in the file clearenv.log.
+:;
+if "%1"=="" goto end
+set MIZ_YES=
+%MIZFILES%\accom text\%1
+%MIZFILES%\chkerr text\%1
+if ErrorLevel 1 goto finish
+%MIZFILES%\verifier -qs text\%1
+%MIZFILES%\chkerr text\%1
+if ErrorLevel 1 goto finish
+call :clrw32 %1 notations
+call :clrw32 %1 definitions
+call :clrw32 %1 expansions
+call :clrw32 %1 equalities
+call :clrw32 %1 requirements
+call :clrw32 %1 registrations
+call :clrw32 %1 constructors
+%MIZFILES%\remflags text\%1.miz
+goto bye
+:end
+echo.
+echo        Enter article name as a parameter.
+echo.
+goto bye
+:finish
+echo.
+echo   Your article reports errors. Remove them and try once more.
+echo.
+goto bye
+:clrw32
+%MIZFILES%\msplit text\%1
+%MIZFILES%\commextr text\%1
+echo 0 >text\%1.cospr.txt
+echo %2>>text\%1.cospr.txt
+echo. >>text\%1.cospr.txt
+%MIZFILES%\clearenv text\%1 ZERO
+set /P MIZ_NBR= <text\%1.cospr.txt
+if %MIZ_NBR%==0 goto end
+:loop
+%MIZFILES%\clearenv text\%1 PREP %MIZ_NBR%
+%MIZFILES%\createvd text\%1
+%MIZFILES%\mglue text\%1
+%MIZFILES%\accom text\%1
+%MIZFILES%\errflag text\%1
+%MIZFILES%\chkerr text\%1
+if ErrorLevel 1 goto bad
+%MIZFILES%\verifier -sq text\%1
+%MIZFILES%\errflag text\%1
+%MIZFILES%\chkerr text\%1
+if ErrorLevel 1 goto bad
+set MIZ_YES=NIE
+%MIZFILES%\clearenv text\%1 %MIZ_YES% %MIZ_NBR%
+goto good
+:bad
+set MIZ_YES=TAK
+%MIZFILES%\clearenv text\%1 %MIZ_YES% %MIZ_NBR%
+goto last
+:good
+:last
+%MIZFILES%\createvd text\%1
+%MIZFILES%\mglue text\%1
+%MIZFILES%\accom text\%1
+set /A MIZ_NBR-=1
+if not %MIZ_NBR%==0 goto loop
+:end
+set MIZ_NBR=
+:bye
+
diff --git a/scripts/WINDOWS/miz2abs.bat b/scripts/WINDOWS/miz2abs.bat
new file mode 100644
index 0000000..6b88b4d
--- /dev/null
+++ b/scripts/WINDOWS/miz2abs.bat
@@ -0,0 +1,21 @@
+@echo off
+rem
+rem                    PC Mizar abstractor BATCH command
+rem
+if "%1"=="" goto exit
+if "%mizfiles%"==""  set mizfiles=c:\mizar
+if exist %mizfiles%\absedt.exe goto mizfiles
+echo Can't find %mizfiles%\absedt.exe
+goto exit
+:mizfiles
+%mizfiles%\accom %1
+%mizfiles%\chkerr %1
+if not ErrorLevel 1 goto continue
+echo There are some accomodator errors
+goto exit
+:continue
+%mizfiles%\absedt %1
+%mizfiles%\edtfile %1
+copy %1.$-$ %1.abs
+echo Abstract file %1.abs created.
+:exit
diff --git a/scripts/WINDOWS/miz2prel.bat b/scripts/WINDOWS/miz2prel.bat
new file mode 100644
index 0000000..0795a1a
--- /dev/null
+++ b/scripts/WINDOWS/miz2prel.bat
@@ -0,0 +1,34 @@
+@echo off
+rem   
+rem                    PC Mizar exporter BATCH command
+rem
+if "%1"=="" goto end
+if "%mizfiles%"=="" set mizfiles=c:\mizar
+if exist %mizfiles%\exporter.exe goto mizfiles
+echo Can't find %mizfiles%\exporter.exe
+goto end
+:mizfiles
+%mizfiles%\accom %1
+%mizfiles%\chkerr %1
+if not ErrorLevel 1 goto continue
+%mizfiles%\errflag %1
+%mizfiles%\addfmsg %1 %mizfiles%\mizar
+goto end
+:continue
+%mizfiles%\exporter %1
+%mizfiles%\chkerr %1
+if not ErrorLevel 1 goto exit
+%mizfiles%\errflag %1
+%mizfiles%\addfmsg %1 %mizfiles%\mizar
+goto end
+:exit
+%mizfiles%\transfer %1
+if exist %1.dno del %1.dno >nul
+if exist %1.dcl del %1.dcl >nul
+if exist %1.dco del %1.dco >nul
+if exist %1.def del %1.def >nul
+if exist %1.the del %1.the >nul
+if exist %1.sch del %1.sch >nul
+echo Local data base created.
+:end
+
diff --git a/scripts/WINDOWS/mizf.bat b/scripts/WINDOWS/mizf.bat
new file mode 100644
index 0000000..a2f5992
--- /dev/null
+++ b/scripts/WINDOWS/mizf.bat
@@ -0,0 +1,34 @@
+@echo off
+rem   
+rem                    PC Mizar Verifier,  BATCH command
+rem
+if "%1"=="" goto exit
+for %%F in (A,a) do if "%1"=="/%%F-" shift
+if "%mizfiles%"=="" set mizfiles=c:\mizar
+if exist %mizfiles%\verifier.exe goto mizfiles
+echo Can't find %mizfiles%\verifier.exe
+goto exit
+:mizfiles
+for %%F in (A,a) do if "%1"=="/%%F+" goto s_accom
+for %%F in (A,a) do if "%2"=="/%%F+" goto accom
+%mizfiles%\makeenv %1
+%mizfiles%\chkerr %1
+if not ErrorLevel 1 goto continue
+%mizfiles%\errflag %1
+%mizfiles%\addfmsg %1 %mizfiles%\mizar
+goto exit
+:s_accom
+shift
+:accom
+%mizfiles%\accom %1
+%mizfiles%\chkerr %1
+if not ErrorLevel 1 goto continue
+%mizfiles%\errflag %1
+%mizfiles%\addfmsg %1 %mizfiles%\mizar
+goto exit
+:continue
+%mizfiles%\verifier %1
+%mizfiles%\errflag %1
+%mizfiles%\addfmsg %1 %mizfiles%\mizar
+:exit
+if exist *.$$$ del *.$$$
diff --git a/scripts/WINDOWS/mizgrep.bat b/scripts/WINDOWS/mizgrep.bat
new file mode 100644
index 0000000..d9f60e2
--- /dev/null
+++ b/scripts/WINDOWS/mizgrep.bat
@@ -0,0 +1,2 @@
+@echo off
+FOR /F "tokens=1 delims=" %%A in ('type %MIZFILES%\mml.lar') do grep -H %1 %2 %3  %MIZFILES%\%4\%%A.%5
diff --git a/scripts/WINDOWS/revedt.bat b/scripts/WINDOWS/revedt.bat
new file mode 100644
index 0000000..283551a
--- /dev/null
+++ b/scripts/WINDOWS/revedt.bat
@@ -0,0 +1,37 @@
+@echo off
+rem
+rem  Mizar revision utility batch
+rem
+if "%1"=="" goto usage
+for %%F in (A,a) do if "%1"=="/%%F-" shift
+if "%mizfiles%"==""  set mizfiles=c:\mizar
+:mizfiles
+for %%F in (A,a) do if "%1"=="/%%F+" goto s_accom
+for %%F in (A,a) do if "%3"=="/%%F+" goto accom
+%mizfiles%\makeenv %2
+%mizfiles%\chkerr %2
+if not ErrorLevel 1 goto continue
+%mizfiles%\errflag %2
+%mizfiles%\addfmsg %2 %mizfiles%\mizar
+goto exit
+:s_accom
+shift
+:accom
+%mizfiles%\accom %2
+%mizfiles%\chkerr %2
+if not ErrorLevel 1 goto continue
+%mizfiles%\errflag %2
+%mizfiles%\addfmsg %2 %mizfiles%\mizar
+goto exit
+:continue
+%1 %2
+%mizfiles%\edtfile %2
+copy %2.$-$ %2.miz
+goto exit
+:usage
+echo  ÿ
+echo  Mizar revision utility batch command
+echo  ÿ
+echo  Usage: revedt [ /a+ ] utility-name file-name
+echo  ÿ
+:exit
diff --git a/scripts/WINDOWS/revedt2.bat b/scripts/WINDOWS/revedt2.bat
new file mode 100644
index 0000000..0c012a2
--- /dev/null
+++ b/scripts/WINDOWS/revedt2.bat
@@ -0,0 +1,39 @@
+@echo off
+rem
+rem  Mizar revision utility batch for chkrprem
+rem
+if "%1"=="" goto usage
+for %%F in (A,a) do if "%1"=="/%%F-" shift
+if "%mizfiles%"==""  set mizfiles=c:\mizar
+:mizfiles
+for %%F in (A,a) do if "%1"=="/%%F+" goto s_accom
+for %%F in (A,a) do if "%3"=="/%%F+" goto accom
+%mizfiles%\makeenv %2
+%mizfiles%\chkerr %2
+if not ErrorLevel 1 goto continue
+%mizfiles%\errflag %2
+%mizfiles%\addfmsg %2 %mizfiles%\mizar
+goto exit
+:s_accom
+shift
+:accom
+%mizfiles%\accom %2
+%mizfiles%\chkerr %2
+if not ErrorLevel 1 goto continue
+%mizfiles%\errflag %2
+%mizfiles%\addfmsg %2 %mizfiles%\mizar
+goto exit
+:continue
+%1 %2
+copy %2.err %2.$er
+%mizfiles%\refrem %2
+%mizfiles%\edtfile %2
+copy %2.$-$ %2.miz
+goto exit
+:usage
+echo  ÿ
+echo  Mizar revision utility batch command for chkrprem
+echo  ÿ
+echo  Usage: revedt2 [ /a+ ] utility-name file-name
+echo  ÿ
+:exit
diff --git a/scripts/WINDOWS/revf.bat b/scripts/WINDOWS/revf.bat
new file mode 100644
index 0000000..ea45dfd
--- /dev/null
+++ b/scripts/WINDOWS/revf.bat
@@ -0,0 +1,38 @@
+@echo off
+rem   
+rem                    PC Mizar utilities BATCH command
+rem
+if "%1"=="" goto usage
+for %%F in (A,a) do if "%1"=="/%%F-" shift
+if "%mizfiles%"==""  set mizfiles=c:\mizar
+:mizfiles
+for %%F in (A,a) do if "%1"=="/%%F+" goto s_accom
+for %%F in (A,a) do if "%3"=="/%%F+" goto accom
+%mizfiles%\makeenv %2
+%mizfiles%\chkerr %2
+if not ErrorLevel 1 goto continue
+%mizfiles%\errflag %2
+%mizfiles%\addfmsg %2 %mizfiles%\mizar
+goto exit
+:s_accom
+shift
+:accom
+%mizfiles%\accom %2
+%mizfiles%\chkerr %2
+if not ErrorLevel 1 goto continue
+%mizfiles%\errflag %2
+%mizfiles%\addfmsg %2 %mizfiles%\mizar
+goto exit
+:continue
+%1 %2
+%mizfiles%\errflag %2
+%mizfiles%\addfmsg %2 %mizfiles%\mizar
+goto exit
+:usage
+echo  ÿ
+echo  PC Mizar utilities BATCH command
+echo  ÿ
+echo  Usage: revf [ /a+ ] utility-name file-name
+echo  ÿ
+:exit
+if exist *.$$$ del *.$$$