The Free On-line Dictionary of Computing (30 December 2018):

Archimedes
Acorn Archimedes

    A family of microcomputers produced by Acorn
   Computers, Cambridge, UK.  The Archimedes, launched in June
   1987, was the first RISC based personal computer
   (predating Apple Computer's Power Mac by some seven
   years).  It uses the Advanced RISC Machine (ARM) processor
   and includes Acorn's multitasking operating system and
   graphical user interface, RISC OS on ROM, along with an
   interpreter for Acorn's enhanced BASIC, BASIC V.

   The Archimedes was designed as the successor to Acorn's
   sucessful BBC Microcomputer series and includes some
   backward compatibility and a 6502 emulator.  Several
   utilities are included free on disk (later in ROM) such as a
   text editor, paint and draw programs.  Software emulators
   are also available for the IBM PC as well as add-on Intel
   processor cards.

   There have been several series of Archimedes: A300, A400,
   A3000, A5000, A4000 and RISC PC.

   Usenet FAQ
   (ftp://rtfm.mit.edu/pub/usenet/news.answers/acorn/).
   Archive site list
   (http://cs.vu.nl/~gerben/acorn/acorn-archives.txt).
   HENSA archive (ftp://micros.hensa.ac.uk/).  Stuttgart
   archive (ftp://ftp.uni-stuttgart.de/pub/systems/acorn).

   See also Crisis Software, Warm Silence Software.

   (1998-04-03)