OTL: Our timeline, history as we know it.
IOTL: In our timeline.
TTL/ATL: This/Alternate timeline (synonyms, or the definate and indefinate article).
ITTL: In this timeline.
ASB: Alien Space Bats. Imaginary creatures invoked to allow something completely implausible to happen. They have their own board. On the other boards, to call something ASB is a snub.
ISOT: Island in the Sea Of Time: referring to a book title. Time travel, and especially taking a land area forward or backwards in time.
I wish this thread had been done a few weeks ago, I had to try to figure it out myself. The only ones I haven't managed to decipher are OOC and IC. They're used in DBWIs, and I know what they generally mean. OOC means a comment from OTL, and IC means a comment from within the ATL. But what do the acronyms actually stand for?
HRE - holy roman empire
Better do this before Susano finds out: its...
HREGN - Holy Roman Empire of the German Nation