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  • Jun 30, 2026, 7:39 AM

    @foone @mjg59 @quixoticgeek Perfect.

    Before IBM adopted the CD-ROM standard, it briefly backed the earlier Programmed Optical Storage (POS), a proprietary six inch optical disc system incompatible with 5.25" drive bays.

    A photo of an IBM 5150, a very early 1980s looking businessy computer with beige plastic, black drive bays and keyboard and a greenscreen monitor, with a single 5.25" floppy and then a 6" POS optical drive with its diagonal slot to fit the wider POS discs.
    💬 5🔄 7⭐ 0

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