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For those interested in the etymology of these:

grep is from the ed command (which itself is short for editor, the original Unix text editor) g/re/p, which Globally searches for a Regular Expression and Prints it.

sed is Stream EDitor.

vi is VIsual editor, which is so named because it's like ed but shows you what you're editing.

Not sure where the name awk comes from.

All of these tools are closely related to the venerable ed(1) command.

Awk is named after its authors at Bell Labs: Aho, Williams, and Kernighan.

Aho, Weinberger, and Kernighan.

You are so right, thank you!

I'm not sure about that - I think you could argue that they're all oddly named.

That's exactly the point of parent comment.

I thought I heard something flying overhead.

also with at, bc, cd, cp, dd, df, du and so on