[dwattttt]

And today I learned this has a name, anacronym! An acronym that has become so common, it's treated as a word instead of an acronym.

[backprop1989]

And to be really pedantic about it, an acronym is pronounceable, like "NASA", so BPF is actually an initialism!

[dwattttt]

An initialism, yet now an aninitialism.