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<p><b>New page</b></p><div>{{Short description|Family of programming languages}}<br />
'''Actor-Based Concurrent Language''' ('''ABCL''') is a family of [[programming language]]s, developed in [[Japan]] in the 1980s and 1990s.<br />
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==ABCL/1==<br />
''ABCL/1'' (Actor-Based Concurrent Language) is a [[prototype-based programming|prototype-based]] [[concurrent programming language]] for the '''ABCL MIMD''' system, created in 1986 by [[Akinori Yonezawa]], of the ''Department of Information Science'' at the [[University of Tokyo]].<br />
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ABCL/1 uses asynchronous [[message passing]] among [[object (programming)|objects]] to achieve concurrency. It requires [[Common Lisp]]. Implementations in [[Kyoto Common Lisp]] (KCL) and [[Symbolics]] Lisp are available from the author.<br />
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===ABCL/c+===<br />
An implementation of ABCL/c+ is available from the ACM.<ref>[https://dl.acm.org/doi/10.5555/646148.679055 An Implementation of an Operating System Kernel Using Concurrent Object-Oriented Language ABCL/c+]</ref><br />
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===ABCL/R===<br />
''ABCL/R'' is an [[object-oriented]] [[reflection (computer science)|reflective]] subset of ABCL/1, written by Professor Akinori Yonezawa of [[Tokyo Institute of Technology]] in 1988.<br />
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====ABCL/R2====<br />
''ABCL/R2'' is a second generation version of ABCL/R, designed for the Hybrid Group Architecture. It was produced at the Tokyo Institute of Technology in 1992, and has almost all the functionality of ABCL/1. It is written in [[Common Lisp]]. As a reflective language, its programs can dynamically control their behavior, including scheduling policy, from within a user-process context.<br />
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==Further reading==<br />
*''ABCL: An Object-Oriented Concurrent System'', A. Yonezawa ed, MIT Press 1990<br />
*''Reflection in an Object-Oriented Concurrent Language'', T. Watanabe et al., SIGPLAN Notices 23(11):306-315 (Nov 1988)<br />
*''An Implementation of An Operating System Kernel using Concurrent Object Oriented Language ABCL/c+'', N. Doi et al. in ECOOP '88, S. Gjessing et al. eds, LNCS 322, Springer 1988<br />
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==References==<br />
{{reflist}}<br />
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==External links==<br />
* {{official website|http://web.yl.is.s.u-tokyo.ac.jp/pl/abcl.html}}<br />
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[[Category:Prototype-based programming languages]]<br />
[[Category:Concurrent programming languages]]<br />
[[Category:Common Lisp (programming language) software]]</div>imported>Kvng