Oldest computer you've used for "real work"?

[Les Bell]

At one point, about ten years ago, I had a 33 MHz (?) 486DX system with 20 MB of RAM which was still running as a backup DNS, mailing list manager (Majordomo) and FTP server. It would have been around 12 years old back then.

But I have a client which is still running a Linux box I installed for them in June 2000. Various printers and monitors have been replaced, but the original computer still lives on, with the software also unchanged except for minor tweaks. In fact, that system replaced an earlier MS-DOS 3.3 system with a dBASE/Clipper application I wrote for them in 1985, and I was surprised when they rang me, out of the blue, to ask if the code was Y2K compliant - which it was; it only needed replacement due to tax law changes.

I've been pondering how to replace the second system, as it can't last much longer; I think the next iteration will move to the cloud.