Op is short for "Channel Operator," i.e. the person(s) who run a channel on IRC. they usually have the telltale "@" before their names.

OP - "Ordo Praedicatorum" (Latin for "Order of Preachers"), religious order founded by St. Dominic de Guzman (1170 - 1221).

Its white-clad (sometimes wearing a black cape) members are better known as the Dominicans. Their motto is Contemplata aliis tradere, which roughly translates "to teach fruits of contemplation". Their most famous member was Thomas Aquinas, OP. Indeed, in modern days, all Dominican priests take a vow of only teaching theology based on Aquinas.

Historically, they were in charge of Holy Inquisition.

ooblick = O = open

op /op/ n.

1. In England and Ireland, common verbal abbreviation for `operator', as in system operator. Less common in the U.S., where sysop seems to be preferred. 2. [IRC] Someone who is endowed with privileges on IRC, not limited to a particular channel. These are generally people who are in charge of the IRC server at their particular site. Sometimes used interchangeably with CHOP. Compare sysop.

--The Jargon File version 4.3.1, ed. ESR, autonoded by rescdsk.

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