Thanks for all of your replies.
When I posted originally I was thinking of philosophers that were organizing their thoughts before the existence of computers without realizing that the advent of the computer was a topic of debate itself. Was an abacus a computer? How about the slide rule? Maybe Conrad (Konrad?) Zuse' Z1 or Z3 The Turing Machine, Binac, ENIAC, UNIVAC? I've gone from 2500 BC to the Eisenhower administration.
What I actually was thinking about were the Western philosophers who laid down principles of logic (or at least moved logic from the province of philosophy to math). Who did that? Anyway, that allowed for development of the logic gate and the ability of a conductor carrying current to reliably answer yes or no to an appropriately phrased problem (mimicking a formula): the first I/O devices.
Then again, 3000 years back Eastern philosophers were throwing the I Ching, the first widespread form of probability divination in Base 2, exactly as accurate as modern shareware that predicts lottery numbers. I'm only sort of kidding. If you are interested in a dynamite translation of the 64 (2power6) hexagrams' ancient text, check out
"I Ching" by Kerson and Rosemary Huang.
So, which philosopher among so many mortals made digital computation possible? Let me ask it backwards (stolen unscrupulously from my one great college prof, Bill Duvall):
QUOTE
Which philosopher, if their writings were tragically erased from the historical record - which erasure would render improbable the existence of computers?