"The Rexx programming language was first created in 1979, as a
very high level scripting language that had a particularly strong
facility for text processing tasks. Since Rexx's inception, IBM has
included versions of Rexx with most of its operating systems -- all
the way from its mainframes, to its mid-level systems, to end user
OS's like OS/2 and PC-DOS. Other OS makers, such as Amiga, have
also integrated Rexx as an always-available system scripting
language. A number of ISVs, moreover, have created Rexx
environments for many platforms. Somewhat late in the game, ANSI
officially adopted a standard for Rexx in 1996.
"Nowadays (especially on Linux or BSD-derived OS's), most of
those older implementations of Rexx are primarily interesting as
historical footnotes. However, two currently maintained
implementations of Rexx remain available across a wide range of
platforms, including Linux, MacOSX and Windows: Regina and NetRexx.
Regina is a native executable, available as Free Software source
code, or pre-compiled to a large number of platforms--install it
pretty much as you would any other programming language
interpreter. NetRexx is an interesting hybrid. The language is a
derivative of plain Rexx. Much like Jython or Jacl, NetRexx
compiles Rexx-like source code into Java bytecodes, and
(optionally) runs the resulting .class file within a JVM. .."
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