PCMCIA but we don't need to use it much nowadays

One that always confuses me is MSM. For over 40 years it has been used to mean "Men who have sex with men", but recently conservatives started using it to mean "mainstream media" and its sometimes hard to tell which of their hates they are talking about. MSM is still widely used in the medical community when discussing/classifying patients and in the ongoing AIDS epidemic.

FLOSS; only because I can only pronounce the second word as leeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeber.

When I see BLM, my first thought is still Bureau of Land Management

Either FR or PFP. "FR" just feels like another filler word. PFP... I'm too used to calling them "avatars", it just feels wrong and superfluous. I'm probably aging myself here.

STFU

I remember watching a video by Ryan Higa thinking it meant "stop tickling furry unicorns", it wasn't until I learned what it actually meant years later that I got pretty damn disappointed.

VOD is a close second though. I hate how you could take something that refers to something so general (videos on demand), and over time starr using it to exclusively refer to past Twitch streams. I know that this is what Twitch calls them, and it's technically not wrong to call them that, but it still doesn't make sense when that's all that VOD means nowadays. I miss the days of being jealous at the Americans for having cable.

I hate all TLAs