CMC is the acronym for...

A username is how you're identified on Twitter, and is always preceded immediately by the ***** symbol.

A website which allows its users to add, modify, or delete its content via a web browser usually using a simplified markup language or a rich-text editor. Most are created collaboratively.

CALL is the acronym for...

Including the @ sign followed directly by a username is called a *****. Also, the tweets in which your @username was included.

Groups of people who share a concern or a passion for something they do and learn how to do it better as they interact regularly.

The use of game-thinking and game mechanics in non-game contexts to engage users in saving problems and increase user's self contributions

MALL is the acronym for...

A message posted via Twitter containing 140 characters or fewer