Earlier quoted context omitted.
Close! The PC Card rename was because people were confusing the name of the association with the specific form factor. PCMCIA and PC Card = ISA CardBus = PCI and ISA - slot was backwards compatible so you could use a PC Card in a CardBus slot ExpressCard = PCIe
That's also not a perfect recollection, but is what my recollection was until I was looking up this history in the past week and found this nugget and posted it elsewhere. Quoting myself: >So we know these were originally called PCMCIA cards, then later PC Cards, right? Well, I think I might have found the first mention of PCMCIA in PC Magazine. It is in a Dec 1991 column by Dvorak where he "introduces" the "PCMCIA P…
It definitely seems to reinforce the joke backronym of "People Can't Memorize Computer Industry Acronyms" for the whole thing given how badly it was all refered to. It's a lot like the whole Clippit/Clippy situation with the Microsoft Office assistants. Originally it was only named Clippit but Clippy got coined by everyone else and even Microsoft ended up giving in and using it in marketing materials not too long after the fact.