1.3 What do these other terms like 'MMOG', 'MMO', 'MMOFPS' and 'PSW
Sigil usually uses the term MMOG (massively multiplayer online game) when we are referring to these games more generally. Adding the RPG into the name tends to denote role-playing, character development, and for some, a fantasy setting.
MMO also means Massively Multiplayer Online game, and refers to the whole superset of these games.
MMOFPS is a Massively Multiplayer First Person Shooter -- for example, the game Planetside.
PSW means Persistent State World, and pretty much is the same as saying MMOG or MMO.
Disclaimer: this is not an official online game lexicon; rather, this genre is new and evolving and all sorts of names and semantics are evolving everyday.