[1] It was written in BCPL for an IBM mainframe at the University of Cambridge and also ran on a system running Panos, which was later sold as the Acorn Business Computer.
[1] On-screen proof-reading was rudimentary on the Acorn Business Computer, which used the BBC Micro for screen output.
The Arthur version initially ran at the command line, but was later converted to use the WIMP and outline fonts.
[1] The software uses PostScript fonts named PMW-Music and PMW-Alpha, which were conceived by the author and Richard Hallas.
[3][7] Musical notation is provided to the software in textual form, which generates output to a printer or for saving in PostScript or Drawfile format.