Source : Free On-Line Dictionary of Computing

UPS
     
        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}.
     
        {(ftp://export.lcs.mit.edu/contrib/)}.  Mailing list:
        [email protected].
     
        Unofficial enhancements by Rod Armstrong 
        {(ftp://sj.ate.slb.com/misc/Unix/ups/contrib/rob)}.
     
        (1991-05-20)