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To be honest BPF is one of those acronyms that I think might be more recognizable as the acronym than what it actually stands for.

Not quite as much as Radar or Laser, but halfway there.

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.

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

An initialism, yet now an aninitialism.