scrog = S = scrozzle

scrool /skrool/ n.

[from the pioneering Roundtable chat system in Houston ca. 1984; prob. originated as a typo for `scroll'] The log of old messages, available for later perusal or to help one get back in synch with the conversation. It was originally called the `scrool monster', because an early version of the roundtable software had a bug where it would dump all 8K of scrool on a user's terminal.

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