GUIDO Music Learning System (1996) 0 Audio DOS

First Released in 1986 by the University of Delaware, GUIDO (Graded Units for Interactive Dictation Operations) was self-paced Ear Training instructional software designed by and for use at the University of Delaware. It was originally programmed on a Burroughs 6700 and later ported to the PLATO system, before it was redesigned for use on the IBM-PC/XT/AT.

• 2.1

Imagine (1993) 1 Graphics DOS

Imagine, from Impulse Inc, was a cutting-edge 3D modeling and ray tracing program, originally for the Amiga computer and later also for MS-DOS and Microsoft Windows. Imagine was a derivative of the software TurboSilver, which was also for the Amiga and written by Impulse. The Windows version of the program was abandoned when Impulse dropped out of the 3D software market; but the Amiga version is still maintained and sold by CAD Technologies. The Windows and DOS versions have been made available in full along with other freely distributed products such as Organica.

• 4.0