11
votes
2answers
2k views

“PIN Number” — why do we say it?

We often say "PIN Number", this is part of everyday conversation. But why? PIN stands for Personal Identification Number, so what we're actually saying is Personal Identification Number Number. Is ...
2
votes
2answers
447 views

How to avoid repeating a word already contained in “RAID”?

I was recently answering a question on Super User about RAID. In this context RAID means "redundant array of independent (or inexpensive) disks". I wanted to point out to fellow user that he should ...