Mr Pedant of Parkstone doesn’t like….
RAM memory, which is redundant because RAM (random-access memory) includes the initial of the word memory.
PIN stands for personal identification number, obviating the second word in PIN number.
ATM machine (automated teller machine machine),
DC comics (detective comics comics),
HIV virus (human immunodeficiency virus virus),
SAT test (Scholastic Achievement/Aptitude/Assessment Test test)
And do you remember VDU Units? Visual Display Unit units…