1. Abbreviation for "I Seek you". 2. A proprietary chatSyStem created by a couple of iSraeli guyS, who later founded "mirabiliS". ICQ waSSold to {America On-Line} around 1998. The name "ICQ" iS a play on "cq", the radio Signal for Seeking converSation. Start . [Confirm derivation? TCP? Summary?] (2000-04-03)