The ones I don't know have question marks next to them:
-Combat
1 Handed Weapons
2 Handed Weapons
Shield/Blocking
Smithing
?Heavy Armor? (The armor skills could be scrapped, who knows?)
?Dual Wielding? (Just a guess, seems redundant with 1 handed weapons)
-Magic
Restoration
Alteration
Destruction
Conjuration
Illusion
Enchanting
-Stealth
Speech craft
?Light Armor? (See above)
?Sneaking? (Could be merged with Security)
?Security? (Could be merged with Sneaking)
Marksman
Alchemy