My first record was Flash Gordon by Queen, the 7" in 1980 (?). Rather
groovy B-side from the "comedy" American football scene.
First IDM depends on whether we're allowing it to exist as a category
again this week. There were numerous Shut Up & Dance-style things I
bought 1990-91 (and other _hardcore devastating floorburners_), but I
suppose the first proper contender that I can remember was the Orb album -
"classical quality vinyl pressing" it said on the sticker.
Alternatively you could say it was the Komakino 7" which came with an
Italian book on Joy Division, 1988/89.
adam
p.s. Schematic 005 is quite nice, in a Autechre type of way. A
description increasingly necessary these days.