From The Free On-line Dictionary of Computing (19 January 2023):
Haskell
hs
<language> (Named after the logician Haskell Curry) A lazy
purely functional language largely derived from Miranda
but with several extensions. Haskell was designed by a
committee from the functional programming community in April
1990. It features static polymorphic typing, higher-order
functions, user-defined algebraic data types, and
pattern-matching list comprehensions. Innovations include
a class system, systematic operator overloading, a
functional I/O system, functional arrays, and separate
compilation.
Haskell 1.3 added many new features, including monadic I/O,
standard libraries, constructor classes, labeled fields in
datatypes, strictness annotations, an improved module
system, and many changes to the Prelude.
Gofer is a cut-down version of Haskell with some extra
features.
Filename extension: .hs, .lhs (literate programming).
["Report on the Programming Language Haskell Version 1.1",
Paul Hudak & P. Wadler eds, CS Depts, U Glasgow and Yale U.,
Aug 1991].
[Version 1.2: SIGPLAN Notices 27(5), Apr 1992].
Haskell 1.3 Report
(http://haskell.cs.yale.edu/haskell-report/haskell-report.html).
Mailing list: <haskell-request@cs.yale.edu>.
Yale Haskell - Version 2.0.6, Haskell 1.2 built on Common
Lisp.
(ftp://nebula.cs.yale.edu/pub/haskell/yale/).
Glasgow Haskell (GHC) - Version 2.04 for DEC Alpha/OSF2;
HPPA1.1/HPUX9,10; SPARC/SunOs 4, Solaris 2;
MIPS/Irix 5,6; Intel 80386/Linux,Solaris
2,FreeBSD,CygWin 32; PowerPC/AIX. GHC generates C
or native code.
(ftp://ftp.dcs.glasgow.ac.uk/pub/haskell/glasgow/).
E-mail: <glasgow-haskell-request@dcs.glasgow.ac.uk>.
Haskell-B - Haskell 1.2 implemented in LML, generates
native code.
(ftp://ftp.cs.chalmers.se/pub/haskell/chalmers/).
E-mail: <hbc@cs.chalmers.se>.
(1997-06-06)