N> (Always abbreviated to "sysop") /sis' op/ A term used iN the BBS world for the operator of a bulletiN-board system (who is usually also the owNer). A commoNNeophyte mistake oNFidoNet is to address a message to "sysop" iN aN iNterNatioNal echo, thus seNdiNg it to huNdreds of sysops arouNd the world. CoNtrast: system chefistrator. (1999-10-20)