What means XD?

[Hallyx]

I see the symbol XD (usually at the ends of sentences) a lot. Would someone please tell me what it means? Also O____0 and T----T and ^.^ and >.< and others I can't think of right now.

An old person would like to know.

Oh, while I have you here.....I'd like to view some of the lovely tank pictures I see at the tops of the pages, but I can't seem to get any of them to open. Is there some special trick I need to know?

Thank you

[adamxaotmic]

They are emoticons. All they are is using symbols to make a certain face.
Like XD means extreme happiness. ^.^ means excited.

http://en.wikipedia.org/wiki/List_of_emoticons

[ollief9]

Look at it sideways. XD

It basically means your like laughing loads

Just look at them like faces.

And ^.^ means like, miffed.

[LaLaLeyla]

There just faces

[Littlebittyfish]

XD
turn your head sideways to the left to look at it.
Its a face. Kinda when you smile or laugh so huge your eyes get squinty.

[Jirothebetta]

Yep, I use the XD symbol a lot...usually to indicate happiness or excitedness or just to convey a positive mood...it also means that I'm smilling really big
I use this symbol to indicate grossness XP Like swallowing brine shrimp water, that is XP...XD