About
forty-two
"Good morning," said Deep Thought at last.
"Er...good morning, O Deep Thought. Do you have...er, that..."
"An answer for you?" interrupted Deep Thought majestically.
"Yes. I have."
"To Everything? To the great Question of Life, the Universe and Everything?"
"Yes. Though I don't think you're going to like it."
"Doesn't matter! We must know it! Now!"
"All right. The Answer to The Great Question... Of Life, the Universe and Everything...is...Forty-two," said Deep Thought, with infinite majesty and calm.
Page 178, "The Hitchhiker's Guide to the Galaxy" by Douglas Adams
foo
Foo /foo/1. Used very generally as a sample name for absolutely anything, especially programs and file (especially scratch files). 2. First on the standard list of metasyntactic variables used in syntax examples. See also bar, baz, qux, quux, corge, grault, garply, waldo, fred, plugh, xyzzy, thud.
The etymology of hackish ‘foo’ is obscure. When used in connection with ‘bar’ it is generally traced to the WWII-era Army slang FUBAR (“F* Up Beyond Repair”), later bowdlerized to foobar.