Skills
In A20 each character gets a number of skill points equal to his intelligence modifier plus a bonus from his class (this total is multiplied at 1st level). Each point lets you gain one rank in any skill. There is no such thing as a class skill in A20, all skills are class skills for all characters. That means that your fighter can have as many ranks in pickpocket as a thief. The skills are as follows (in brackets are the 3.5 skills that they represent).
Acrobatics (balance, jump, tumble)
Appraise
Athletics (climb, swim)
Bluff
Concentration
Craft
Decipher script
Diplomacy (diplomacy, gather information)
Disable device
Disguise
Forgery
Handle animal (handle animal, ride)
Intimidate
Knowledge
Listen
Perform
Profession
Search
Sense motive
Sleight of hand
Spellcraft (spellcraft, knowledge (arcana))
Spot
Stealth
Survival (survival, knowledge (nature))
Use magic device

Use rope and escape artist are removed, each being represented by a dex check.

The skill points per class are listed below:
Barbarian: 4
Bard: 6
Cleric: 2
Druid: 4
Fighter: 2
Shaman: 4
Sorcerer: 2
Thief: 8
Wizard: 4

Variant classes:
Abjurer: 4
Defender: 2
Diviner: 4
Enchanter: 4
Illusionist: 4
Necromancer: 4
Summoner: 4
Transmuter: 4
Warlock: 2
Warmage: 2