Countdown to Doom 1984 Acornsoft Hopper 1984 Acornsoft Snapper 1983 Acornsoft Starship Command 1983 Acornsoft Electron Demonstration Cartridge 198? Acorn Tree of Knowledge 1983 Acornsoft LISP 1984 Acornsoft Logo 1985 Acornsoft ISO-Pascal 1985 Acornsoft Click v1.00 1990 Slogger Click v1.01 1990 Slogger Click v1.03 1990 Slogger Click v1.04 1990 Slogger Starspell 1989 Slogger Starspell & Starword 1989 Slogger Starspell & View 1989 Slogger Stop Press 1987 Slogger Stop Press 64 1991 Slogger View 1984 Acornsoft ViewSheet 1984 Acornsoft Advanced Battery-Backed RAM v1.10 1987 Advanced Computer Products Advanced Battery-Backed RAM v1.04 1987 Advanced Computer Products Advanced Plus 3 1987 P.R.E.S. Advanced Plus 4 1986 Advanced Computer Products Advanced Plus 3/4 1988 P.R.E.S. Advanced Plus 5 1985 Advanced Computer Products Advanced Quarter Meg RAM 1987 Advanced Computer Products Commstar E1.10 1985 PACE Commstar E1.12 1985 PACE Cumana Floppy Disc System v1.00 1985 Cumana Cumana Floppy Disc System v1.01 1985 Cumana Cumana Floppy Disc System v1.02 1985 Cumana Pegasus 400 v1.01 1987 Slogger Pegasus 400 v1.02 1987 Slogger ROMPlus-144 v2.1 1988 JAFA Systems ROMPlus-144 v3.0 1988 JAFA Systems Slogger Electron Disk System v1.00 1986 Slogger Slogger Electron Disk System v1.02 1986 Slogger Slogger Electron Disk System v1.03 1986 Slogger Solidisk EFS 2.1E 1985 Solidisk Sound Expansion 1988 Project Expansions Sound Expansion 2.0 1988 Project Expansions Sound Expansion 3.0 1989 Complex Software Systems Acorn Tube Interface (prototype) 1984 Acorn Computers UPURS 1.0E 2012 Martin Barr Mega Games Cartridge 2017 Retro Hardware