Twitter tweet help please?

[396]

Ive noticed in peoples tweets they are adding pictures and internet pages, and metioning people and songs and stuff.
could someone list all the keypad shortcuts used on twitter.
I know the @ one but what else is there?

[mikesimarta]

D to direct message (D (username) message)
# as a topic like I'm on the #newTwitter
pictures and links are automatically added or shorten from phones

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http://twitter.com/mike_PutriBro