LispWorks is computer software, a proprietary implementation and integrated development environment (IDE) for the programming language Common Lisp. LispWorks was developed by the UK software company Harlequin Ltd., and first published in 1989.[1] Harlequin ultimately spun off its Lisp division as Xanalys Ltd., which took over management and rights to LispWorks. In January 2005, the Xanalys Lisp team formed LispWorks Ltd. to market, develop, and support the software.

ParadigmsMulti-paradigm: procedural, functional, object-oriented, meta, reflective, generic
DevelopersHarlequin Ltd. 1987–2000
Xanalys Ltd. 2001–2005
LispWorks Ltd. 2005–2019
First appeared1989 (1989)
Stable release
7.1.2 / September 5, 2019 (2019-09-05)
Typing disciplineDynamic, strong
ScopeLexical, optional dynamic
Implementation languageCommon Lisp
PlatformIA-32, x86-64, ARM, SPARC, PowerPC
OSWindows, macOS, Linux, FreeBSD, Solaris, AIX, Android, iOS
Influenced by
Lisp, Common Lisp

LispWorks's features include:

The Enterprise edition also includes KnowledgeWorks, which supports rule-based or logic programming (including support for Prolog); the CommonSQL database interface; and a Common Object Request Broker Architecture (CORBA) binding.

In September 2009, it was announced that LispWorks 6 would support concurrent threads and the CAPI graphics toolkit has been extended to support GTK+.[3] LispWorks 6.1, released in January 2012,[4] includes many further enhancements to CAPI, such as support for anti-aliased drawing.

LispWorks ran on the spacecraft Deep Space 1. The application called RAX won the NASA Software of the Year award in 1999.[5]


1987alphaHarlequinBegun by British firm
12 Sep 19891.0HarlequinGUI with CLX, CLUE, and LispWorks toolkit
Dec 19913.0Harlequin
17 Mar 19974.0HarlequinFor Windows, GUI with CAPI, CLIM 2.0
6 Jan 19994.1HarlequinWith CORBA, Linux port
19 Feb 20014.1.20Xanalys
19 Dec 20014.2XanalysNo run time fees for applications on Windows
5 May 20024.2.6Xanalys
30 Jun 20034.3XanalysFirst release for macOS, with Cocoa support
8 Dec 20044.4Xanalys
15 Apr 20054.4.5LispWorks
31 Jul 20065.0LispWorks64-bit support, FreeBSD port
27 Mar 20085.1LispWorks
6 Jan 20106.0LispWorksWith symmetric multiprocessing, Solaris on Intel port, CAPI for GTK+
27 Jan 20126.1LispWorksHigh-quality drawing, 64-bit FreeBSD port
5 May 20157.0LispWorks[6]ARM Linux, iOS, Android, full Unicode, Hobbyist Edition
13 Nov 20177.1LispWorks[7]64-bit iOS, ARM64 Linux

See also


  1. "LispWorks 1.0 released in 1989".
  2. "The Listener (LispWorks IDE User Guide (Macintosh version))". 12 Feb 2015. Retrieved 2019-01-06.
  3. "LispWorks 6.0 beta announcement". Retrieved 2013-07-19.
  4. "Release of LispWorks 6.1". Retrieved 2013-07-19.
  5. "NASA Software of the Year award for Harlequin based development" (PDF). Retrieved 2013-07-19.
  6. "Release of LispWorks 7.0". Retrieved 2015-05-09.
  7. "Release of LispWorks 7.1". Retrieved 2018-03-07.
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