XP is in fact the first two letters of the greek word for Jesus Christ - XPICTOC.
Pronounced 'chi-rho', XP is an ancient,
officially recognised abbreviation for Christ. It was inroduced as an emblem by Constantine the Great, which is why it is more commonly known as the Constantian symbol, you have probably seen this symbol before but not realised it was made up of X and P.צימרים בצפון
Edited by marselmartin, 01 June 2010 - 10:50 PM.