25A = 25th Amendment, etc...
2A = Second Amendment (to the US Constitution)
abbr = abbreviation
AI = artificial intelligence
A = amps
BBC = British Broadcasting Corporation
BFG = Big Friendly Giant (or Big Fucking Gun)
blm = Black Lives Matter
btw = by the way
CCP = Chinese Communist Party
CDC = Centers for Disease Control and Prevention
CDCP = the correct abbr for CDC
deco = decompression (scuba diving)
DFS = Dynamic Frequency Selection
disam = disambiguation
DS9 = Star Trek: Deep Space Nine
EMI = elecromagnetic interference
EM(R) = electromagnetic radiation
epr = Einstein–Podolsky–Rosen paradox
FDR = Franklin D. Roosevelt
fedi = fediverse
FWIW = For what it's worth
HGV = Hypersonic glide vehicle
IR = infrared
JFK = John Fitzgerald Kennedy
JPL = Jet Propulsion Laboratory
lol = (I am) laugh(ing) out loud
ms = millisecond
N95 = NIOSH rating for respirators (95% filtration)
N99 = NIOSH rating for respirators (99% filtration)
N100 = NIOSH rating for respirators (99.97% filtration)
NASA = NASA (everyone knows what NASA is)
NIOSH = National Institute for Occupational Safety and Health
NPR = National Public Radio
OP = original post, original poster (the first post in this thread)
potus = President of the United States
qcd = quantum chromodynamics
qed = quantum electrodynamics
qm = quantum mechanics
ROC = Tiawan, Republic of China
scifi = science fiction
scotus = Supreme Court of the United States
scuba = self-contained underwater breathing appartus
STE(A)M = science, technology, engineering, (arts), math(s)
TIL = Today I learned
tmux = terminal multiplexer (a Linux utility)
TNG = Star Trek: The Next Generation
TOS = Star Trek: The Original Series; also, "Terms of Service"
u = micron (or micro-)
usec = microsecond
UTC = Coordinated Universal Time
V = volts
vax = vaccine
W = watts
wrt = with regard to
wtf = a profane exclamatory interrogative
www = World Wide Web


TFW = that feeling when

UI = user interface
UX = user expereience

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ASD = Autism Spectrum Disorder
AS = Asperger's Syndrome
DSM-5 = Diagnostic and Statistical Manual of Mental Disorders, Fifth Edition

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@Pat To add Dutch ones:

BTW: Belasting Toegevoegde Waarde, a tax on our products.
WTF: Werktijdfactor, the amount of hours a teacher works, basically. I always have to laugh whenever I see this in our internal mailinglist...

@Pat Mm, I always thought it was:
too lazy; didn't read


I think it's suppose be "Too long; didn't read", meaning whatever info was provided, the poster of "TL;DR" thought it was too much so they didn't bother to read it.

My tongue-in-check disambiguation was a commentary on people being too lazy to read (and therefore less informed).

@Pat Oh whoopsie. Yeah, it is 'too long; didn't read'. But too lazy is pretty fitting too in most of those cases. ;)

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