BBC Master 512 System Discs 1986 Acorn Computers DOS Plus with Econet Software 1987 Acornsoft Master 512 Technical Guide Programs 1989 Dabs Press Dabs Shareware Vol.1 1988 Dabs Press Dabs Shareware Vol.2 1988 Dabs Press Problem Solver 2.0 1989 Shibumi Software Rat Driver 1988 Shibumi Software