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Ask HN: Who's still keeping a DOS machine up because the business depends on it?

297 points · 304 comments · mlaux

foofoo55 · 1790434617 · focus · HN ↗
One of our vendors is a contract electronic manufacturer (circuit board stuffer) that has a wave soldering machine running MS-DOS on a PC that's built into the control cabinet. It uses the parallel port to communicate with Opto22 industrial i/o modules, which then is wired to all the temp sensors, relays, etc. It just keeps working.

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