There are teachers still using cassette tapes (not mp3 players), and some even use 35mm film. However, in education, we don't pitch it out until it's no longer useful. Animated GIFs were quickly adopted by the evolving Internet of the 1990s, and for the most part, are becoming as obsolete as 8-track tape players. GIFs offered more colors than other formats in 1987 and with the revised format in 1989 animation was available in 256 colors with a new "interlacing technology". Heralded in 1987 by CompuServe on their early bulletin board system in pre-Internet times as a way to display pictures (anyone else remember the motto, "choosy developers choose GIFs"? And yes, it's pronounced with a soft g).
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