[cmpb]

I really like this version of the joke, but it's impossible to tell during regular face-to-face conversation

[kroolik]

You can pronounce it with the cardinals

1st Cache invalidation

3rd Concurrency

2nd Naming things

4th Off-by-one errors

[lcnPylGDnU4H9OF]

That could work but it would be easy to get the timing wrong.

Also, nit: those are ordinals (since they specify the order). Cardinals would be one, two, three, four.

[kroolik]

Naming is hard ;) But thanks for the nitpick

[phendrenad2]

Cache invalidation, concurrency (say slowly), naming things, off-by-one errors, and concurrency!