Rules governing socially acceptable behavior for AOL Instant Messenger.
Common infractions include: inappropriate timing of IM's, typing too many messages too quickly that causes the other IMer to become confused, using too many acronyms to comprehend, inappropriate comments about mothers, etc.
SN1: do you still have room in your car for <trip that is 2 weeks away and has no need to be answered any time soon>?
Auto Response from SN2: I am incredibly busy. Please do not IM me unless you have pressing matters that need to be discussed before 10 PM.