The Free On-line Dictionary of Computing (30 December 2018):
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
There have been several series of Archimedes: A300, A400,
A3000, A5000, A4000 and RISC PC.
Archive site list
HENSA archive (ftp://micros.hensa.ac.uk/). Stuttgart
See also Crisis Software, Warm Silence Software.