A couple that aren't usually thought of as sci-fi but would be if they were publiished today: "Utopia" by Thomas More, and Swift's "Gulliver's Travels". As far as more modern books go, one of my favorites, for it's great plotting and incredibly prescient imagining of an information web, is "Shockwave Rider", by John Brunner.

About 13.75 billion years ago, actually.

Bought my first memory expansion card - 16K board (with about 16K chips on it!) - from Godbout Electronics for $385. Used Michael Shrayer's Electric Pencil, which doubled my productivity as a writer (all supsequent productivity increases have added perhaps another 40%). Learned to program in Z80 Assembler; BASIC was second language. Tom Pittman's Tiny BASIC loaded from cassette tape, was full-featured integer BASIC with integrated program editor, that ran in 5K memory. Bought it in 1978; founded WBK ad agency in '79 (by that time, computer had been upgraded with 2 8" floppy disk drives); switched to Heath/Zenith Z89 a year or so later; by 1991, when I sold out, we had 75 Macs networked, all under control of one guy who spent 25% of his time on net management and the rest doing graphic design.

Richard