Dictionary:
Glossary 0-9

0sec:
As in 0sec access to a release. Means someone has access to a release immediately after it's released.

0hour:
As in 0hour access to a release. Means someone has access to a release within an hour after it was released.

0day:
As in 0day access to a release. Means someone has access to a release within a day after it was released.

1337:
See leetspeak

256MS, 512MS, 1GB and 2GB:
These tags only apply to PSP releases, and they show the required size of an UMD disc. UMD discs can contain 2 gigabyte maximu. When a game is 100mb it fits on every UMD disc, but when a game is 900mb it will only fit on 1GB and higher UMD discs.