Autodesk AutoCAD (1984) 23 Graphics Engineering DOS

AutoCAD, from Autodesk and first released in 1982, is a powerful Computer Aided Design tool. It was, and still is, often considered the standard for CAD tools. Primarily for the IBM PC platform, it was ported to x86 machines with higher video resolutions such as the Zenith Z-100 and NEC APC. Intermittently, versions for the Macintosh appeared. Later versions use a dongle copy protection.

• 1.x (DOS)
• 2.x (DOS)
• r10 (DOS)
• r11 (DOS)

Eureka: The Solver (1987) 3 Mathematics DOS

Eureka is a friendly and well-polished equation solver and plotter published by Borland. The software was targeted at both business people and scientists. Not only does it include scientific function, it also includes financial functions. It was notable for having a friendly windowing and menuing interface that let users do multiple things at a time. It competed directly with Mathcard.

• 1.0

Proteus Design Suite (1992) 1 Engineering DOS

Proteus Design Suite is a circuit design and simulation program.

• 2.20