[milliams]

I have problems remembering the mnemonic for -A and -B. I can't get it straight whether it's "before" and "after" or "above" and "below". I always just try one then the other!

[______-_-______]

I've never had trouble remembering, but after reading this comment I'm afraid I might start :(

(joking)

[VTimofeenko]

The way I remember this is by keeping in mind that grep processes the area of the search as a stream of discrete lines by looking at each line individually. "Above/below" are concepts on the stream level, and "after/before" are on the line level.

[waynesonfire]

A after, B before, C context (for both)

[indigodaddy]

Same!