Techies take pride in using genuinely antiquated systems. Thus, it's no surprise that a humble-brag post on Reddit from YouCantOutrunABear, describing the 23-year-old system he uses working for a silver mining company, bubbled up to Reddit's front page.
The computer, a MicroVAX 3100 from the Digital Equipment Corporation, sports an awesome 12MB of RAM. It's running OpenVMS, used in 1989 and still produced by Hewlett-Packard, though installing the latest version on that old machine would be tough.
YouCantOutrunABear's machine runs several non-mission-critical programs, including computations on silver price conversions. It also prints labels onto a printer that's almost as antiquated.
(The monitor sitting on a brick is a nice touch.)