See also:

• Computers: Programming: Languages: Data Structured  (4)
• Computers: Programming: Languages: Functional  (54)
• Computers: Programming: Languages: Garbage Collected  (4)
• Computers: Programming: Languages: Interpreted: Multiparadigm  (1)
• Computers: Programming: Languages: Lisp: Compilers and Interpreters  (37)
• Computers: Programming: Languages: Multiparadigm  (22)
• Computers: Programming: Languages: Open Source  (2)
• Computers: Programming: Languages: Reflective  (8)

• Arc Forum   - Newbie-friendly community, because all Arc users are new to some extent. User forums with many threads. Open source, Perl Artistic License.

• Arc - Lisp dialect by Paul Graham; readings in: design philosophy, lessons, why it isn't especially object-oriented, FAQ. Open source, Perl Artistic License.
• Google Groups: LSharp - User community, forums with several threads.
• L Sharp .NET - Lisp-like scripting language for .NET; uses Lisp dialect similar to Arc but tightly integrated with .NET Framework which has a rich set of libraries. Open source GPL.
• Rob Blackwell - Weblog on development, news, views, software experiments, by L Sharp author.
• Robert Morris - Page at Massachusetts Institute of Technology, Computer Science and Artificial Intelligence Laboratory (CSAIL), in the PDOS group, of main Arc coauthor. Contact information, list of publications, talks.
• SourceForge.net: L Sharp - Project page, with downloads, repositories, forum.
• Wikipedia: Paul Graham - Encyclopedia article, with links to many related topics.
• Wikipedia: Robert Tappan Morris - Encyclopedia article, with links to many related topics.