essay "The Cathedral and the Bazaar" by Eric Raymond, about open-source software. May possibly have been the first thing to call it "open source". Contains the famous-ish aphorism: "With enough eyeballs, all bugs are shallow". Launched ESR's career as an open-source blowhard.
(I just noticed that I accidentally swapped two words earlier which may have given the impression that I was in some way endorsing the "Left Behind" books. The reverse is the case.)