Can't find anything in the manual or on this board or even google about the unit stat symbols. What I'm talking about in particular are the ~, <>, and () symbols that some units have. Can someone help me out and tell me what specifically do they mean, and if I forgot any of the symbols feel free to add them and describe what they are for. Thanks guys.

Here's a list of all the ones I could find in-game.

~ -Amphibious (can attack from sea)
^ -Drop (can perform air-drops, or orbital insertions with the right secret project)
<> -Air superiority (for attack, can attack air units); AAA (for defense, bonus when defending against air units)
() -Artillery (can bombard enemy units)
+ -ECM (bonus vs fast units)
e -bonus vs PSI (attack)
t -bonus vs PSI (defense)
x -nerve gas (bonus to attack, atrocity)
? -indicates PSI attack or defense for unit