Rerun Y2K #75 answer

LINUX

Why LINUX is a Y2K word

The free penguin-mascot operating system that dot-com-era nerds installed to prove a point — usually to their own printers.

About Rerun

Rerun is a free daily word game set in the culture of another time. Season 01 is Y2K: guess one late-’90s or 2000s word in six tries, with a category as your clue. A new puzzle unlocks every day at midnight Pacific.