Autodesk AutoCAD (1984) 25 Graphics Engineering Unix

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.

• r10 (Unix)

DEC OSF-1 (1991) 0 Unix

DEC OSF-1 was a version of UNIX from DEC built on the Mach kernel. It was first developed for MIPS based DECStations, and then ported to 64-bit DEC Alpha (AXP). It was later renamed to Digital Unix, and then again to True64 Unix.

• 1.x
• 2.x

DELL Unix (1992) 6 Unix

Dell Unix, first introduced in 1989, was an adaptation of AT&T Unix intended for Dell hardware. Although Dell Unix received much praise, Dell found they could not reasonably support it on non-Dell hardware, as many customers wanted, and in 1993 discontinued it.

• 4.0

Xenix Software Development System (1983) 1 Unix

The Xenix Development System is a set of compiler and code tools for the Xenix operating system.

• 1.x (TRS)
• 1.00 (IBM)
• 2.00 (IBM)
• 2.x (SCO)