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by h2odragon 1041 days ago
Analog video encryption and decryption, perhaps. see https://en.wikipedia.org/wiki/Videocipher

Knuth used to have a section on "sorting with tapes" that he removed; but the problems there might still generalize to slower access methods even when they're not as strictly sequential as tapes. Maximizing bandwidth to GPU chores and searching through 10TB+ hdd's with only relatively tiny access speed both have similarities to some of those problems.