1. uninterruptible power supply.

2. A source level C debugger that runs under X11 or SunView by Mark Russell <>. Ups includes a C interpreter which allows you to add fragments of code simply by editing them into the source window. Version 2.1.

Ported to Sun, DECstation, VAX Ultrix, HLH Clipper. Mailing list:

Unofficial enhancements by Rod Armstrong <>