OOC

OOC is an acronym for 'out of character'.

OOC boards at Pro and MB are places where members post as themselves - that is, not as narrators telling a story.

[General Chat] is an entirely OOC board. Storyboards all have an OOC section for the writers to discuss things related to the plot and what's happening next.

The acronym OOC can also be used in the sense of behaving out of character (doing uncharacteristic things).

IC means 'in character'. Some boards or writing may be written in-character but not be part of an official storyline (i.e. not 'canon') - for example, some characters have blogs, which are primarily used to develop the character and fill in backstory.