What is the definition of Remainder Computing?

Remainder computing, my friend, is like the digital equivalent of a leftover pizza slice at a party - it's all there, but nobody seems to want it anymore. It's the digital residue that linger after the main event, the bits and bytes of old stuff that nobody needs anymore but keeps popping up in tech support calls or forgotten passwords.

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Example sentence with a dash of edginess: "The tech support crew decided to 'emainder computing' the old CRT monitor, only to find out it was still trying to tell them to reset its memory address."