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The drive that made every PC a record-pressing plant. You fed in a blank CD-R, dragged your downloads into Nero or Easy CD Creator, and held your breath: one buffer underrun mid-burn and the disc was a coaster. When it worked, you walked away with a fresh mix CD and the quiet pride of having pressed it yourself.
The flash-memory bricks that freed your MP3s from the desktop. Diamond's Rio PMP300, arriving in September 1998 at $200, was the first MP3 player that actually caught on — deck-of-cards sized, running forever on one AA battery, holding maybe eight or ten songs. No moving parts meant no skips, a revelation after a decade of portable CD players. The RIAA sued to kill it; the courts sided with you instead.