Version 2.7, June 2013
* Larger test set.
* Fixes several reported issues.

Version 2.6, November 2012
* Larger test set.
* Hyperlinked manual.
* Fixes several reported issues.

Version 2.5, October 2012
* FHS 2.3 compliant.
* Larger test set.
* Fixes minor issues.
* Adds routine "abend" (exits with runtime error).

Version 2.4.1, June 2012
* Fixes issue in transput library.
* Fixes issue in garbage collector.
* Documentation updates.
* Better distribution lay-out.

Version 2.4, June 2012
* Adds pretty-printer.
* Simplified garbage collector.
* Adds procedure "read line" (calls GNU readline).
* Adds procedure "on gc event".
* Adds option --storage [=] n.
* Fixes error in option --handles.
* Removed the field-selector extension.

Version 2.3.9, April 2012
* Fixes curses build issue.
* Documentation updates.

Version 2.3.8, April 2012
* Fixes build issues on Solaris and Cygwin.
* Adds procedures "rows" and "columns".
* Documentation updates.

Version 2.3.7, February 2012
* Fixes build issue occuring on some platforms.

Version 2.3.6, February 2012
* Source code maintenance.
* Documentation updates.

Version 2.3.5, December 2011
* Fixes issues in 2.3.4.
* Source code maintenance.
* Documentation updates.

Version 2.3.4, November 2011
* Fixes issues in 2.3.3.
* Source code maintenance.
* Documentation updates.

Version 2.3.3, October 2011
* Adds code clause.
* Fixes issues in 2.3.2.
* Source code maintenance.
* Documentation updates.

Version 2.3.2, October 2011
* Fixes issues in 2.3.1.
* Source code maintenance.
* Documentation updates.

Version 2.3.1, September 2011
* Adds building on NetBSD.
* Fixes minor issues in 2.3.0.
* Lint-free source code.

Version 2.3.0, September 2011
* Implements ghost elements for empty rows.
* Implements non-local environs.
* Fixes issues in 2.2.0.
* Updates documentation.

Version 2.2.0, July 2011
* Improves the parser.
* Improves handling of unclosed files.
* Adds compilation of uniting.
* Adds routine grep in substring.
* Fixes minor issues in 2.1.2.
* Updates documentation.

Version 2.1.2, January 2011
* Updates documentation.
* Fixes reported problem in version 2.1.1.

Version 2.1.1, January 2011
* Adds configuration options to configure script.
* Updates the documentation.
* Fixes reported problems in version 2.1.0.
* Improves error messages for options to a68g.

Version 2.1.0, January 2011
* Upgrades to the GNU build system using autoconf and automake.
* Updates the memory management system.
* Adds compilation of basic integer-case-clauses.
* Adds compilation of LONG INT and LONG REAL units.
* Adds optimisation options -O0, -O1, -O2 and -O3.
* Adds option --clock.
* Fixes reported problems in version 2.0.3.

Version 2.0.3, November 2010
* Adds compilation of basic loops; complex loops are interpreted.
* Fixes reported build problem on platforms without the GNU Scientific Library.

Version 2.0.2, November 2010
* Adds option --script.
* Adds Algol 68 comment syntax for shell interpreter call.
* Updates documentation.
* Regression fixes:
1. A buffering problem could occur when using routines --set or --backspace
2. Some minor errors in the compiler

Version 2.0.1, September 2010
* Fix minor inconsistencies between source code and documentation.

Version 2.0.0, September 2010
* Adds compiler for units to speed execution.
* Adds options --optimise and --no-optimise.
* Adds options --compile and --no-compile.
* Adds options --object and --no-object.
* Adds option --strict.
* Improves parser.
* Improves diagnostics.
* Updates documentation.
* Regression fixes:
1. Zero-suppression sometimes failed in formatted transput.
2. The default draw fill style was 1, not 0 as stated in the manual.

Version 1.18.0, August 2009
* Regression fixes:
1. Rowing failed for some flexible rows.
2. Generator failed for some structures.
3. Garbage collector could crash under rare circumstances.
4. Some flexible mode declarations were not accepted.
5. Some modes were incorrectly marked as equivalent.
6. Unnecessary size limitations in some matrix operations.
7. Build error on Mac OS X.
8. Alignment error on AMD64.
* Adds field-selections as an alternative to selections.
* Adds NEW as alternative to HEAP.
* More efficient use of memory during compilation.
* Documentation updates.
* Upon request, re-post the HTML translation of the Revised Report.
* Change to a common Linux-style version numbering
  (former Mark j will now read Version 1.j.0, and 
   former Mark j.k will now read Version 1.j.k)

Version 1.17.0, May 2009
* Adds C-style placeholders in formats.
* Adds warnings when tags hide declarations with larger reach.
* Regression fixes:
1. The while-part range was not visible from deeper ranges in case 
   a loop-clause was the sole unit of a routine-text.
2. SKIP did not generate a value for some modes.
* Lint-free source code.
* Documentation updates.

Version 1.16.0, April 2009
* Regression fixes.
* Documentation updates:
1. Adds Revised Report to the LaTeX documentation.
2. Discontinues HTML translation of the Revised Report.

Version 1.15.1, January 2009
* Adds Laplace transform.
* Regression fixes and documentation updates.

Version 1.15.0, December 2008
* Regression fixes and documentation updates.
* Improves diagnostics.

Version 1.14.1, November 2008
* Implements zero replicators as required by the Revised Report.
* Decommissions (undocumented) VMS option syntax.

Version 1.14.0, October 2008
* Adds first edition of the Algol 68 Genie User Manual.
* Adds Revised Report (HTML translation 1.2) to the documentation.
* Adds option --link to the monitor.

Version 1.13.0, June 2008
* Adds procedures to interrogate files and directories.
* Adds various operators and procedures.
* Adds --apropos to command line options and monitor options.

Version 1.12.0, May 2008
* Improves code for the parallel clause.
* Improves interpreter efficiency.
* Improves breakpoint commands in the monitor.
* Adds options UNTIL, FINISH and OUT to the monitor.
* Adds Revised Report (HTML translation 1.1) to the documentation.

Version 1.11.1, March 2008
* Adds options RERUN, RESET and RESTART to monitor.
* Adds Revised Report (HTML translation 1.0) to the documentation.

Version 1.11.0, November 2007
* Adds support for sound.
* Adds Fourier transforms.
* Adds pseudo operator DIAG.
* Adds pseudo operator TRNSP.
* Adds pseudo operator COL.
* Adds pseudo operator ROW.
* Improves diagnostics in formatted transput.
* Improves monitor.

Version 1.10.2, April 2007
* Adds procedure "real".
* Adds format pattern 'h'.
* Adds operator OP SET = (INT, L BITS) L BITS.
* Adds operator OP CLEAR = (INT, L BITS) L BITS.

Version 1.10.1, December 2006
* Improves interpreter efficiency.

Version 1.10.0, August 2006
* Adds basic linear algebra.
* Adds procedures "arctan2", "long arctan2" and "long long arctan2".
* Adds procedure "execve output".
* Improves diagnostics.
* Adds option --no-backtrace.

Version 1.9.2, July 2006
* Adds typographical display features.

Version 1.9.1, May 2006
* 64-bit safe interpreter.
* Improves monitor/debugger.
* Adds option --monitor (or --debug).
* Adds procedure "monitor".

Version 1.9.0, March 2006
* Adds basic PostgreSQL support.
* Adds procedure "utc time" (UNIX).
* Adds procedure "local time" (UNIX).
* Improves diagnostic messages.

Version 1.8.1, November 2005
* Adds procedure "sub in string" (UNIX).
* Adds option --portcheck cf. standard hardware representation.
* Adds option --pedantic.

Version 1.8.0, July 2005
* Adds procedure "http content" (UNIX).
* Adds procedure "tcp request" (UNIX).
* Adds procedure "grep in string" (UNIX).
* Adds procedure "last char in string".
* Adds procedure "string in string".
* Adds keyword UNTIL to implement post checked loop.
* Adds keyword DOWNTO to complement TO.
* Adds keyword ANDTH as alternative for ANDF and keyword OREL as alternative for ORF.
* Makes ~ a SKIP when used as a unit (cf. RR).

Version 1.7.0, May 2005
* Adds partial parameterisation following C. H. Lindsey's proposal.
* Adds elementary and trigonometric functions for complex numbers, independent of GSL.

Version 1.6.0, March 2005
* Adds parallel clause on platforms that support POSIX threads.

Version 1.5.0, October 2004
* Improves interpreter efficiency.
* Adds transput on STRING as well as FILE and PIPE.
* Adds dynamic scope checking.
* Adds basic preprocessor.
* Adds curses support.

Version 1.4.0, June 2004
* Adds more GSL support.
* Adds modes LONG BITS and LONG LONG BITS.
* Makes parser accept ( .. ) as alternative for [ .. ].
* Makes parser optionally treat { .. }, [ .. ] and ( .. ) as equivalent.
* Makes parser accept loop clause as encloses clause.
* Makes mode checker accept UNION with components relates through deflexing.
* Changes to thread safe plotutils interface.

Version 1.3.2, March 2004
* Adds overflow checks for primitive modes.

Version 1.3.1, January 2004
* Adds optional system stack overflow handling to interpreter.
* Improves multiprecision library.

Version 1.3.0, September 2003
* Adds formatted transput.
* Improves speed of multiprecision library.

Version 1.2.0, March 2003
* Adds mode BYTES and LONG BYTES.
* Adds mode FORMAT and parsing of FORMAT texts.
* Adds straightening in unformatted transput.
* Adds mode PIPE and UNIX support.
* Changes to UNIX system level IO.

Version 1.1.0, November 2002

Version 1.0.0, September 2002

Beta releases from November 2001 onward.
