In Aion there are 4 different weapon categories; One Handed Weapons, Two handed Weapons, Magic Weapons and Ranged Weapons.

Attack speed (Att.Speed) represents the, things can be so logical sometimes, attackspeed of the weapon.

Attack Number (Att.num) represents the number of the attacks, for example a Dagger (Att.Num 1) can only cause a single attack, but a Two handed Sword (Att.Num 3) can cause up to 3 hits per attacks, of course it all depends on luck.

Enchant Number symbolises the increase in attack when the weapon is enchanted +1.

Critical Rate symbolises the.. well critical rate of the weapon obviously, ranging from 10 (low) to 100 (High).
 
Dagger (Attack Num 1) Two Handed Sword (Attack Num 3)

These are wielded in one hand, and can either be used with a Shield or another One-Handed Weapon.
Attack
Speed		 Attack
Numer		 Enchant
Number		 Critical Rate
Dagger - Low damage but high attack speed, it fits Ranger and Assassin 1.2 [Fast] 1 +2 100
 
One handed Short Sword - normal damage and attack speed, and equip shield meanwhile, it fits many classes. 1.4 [Normal] 2 +2 50
 
Mace - normal damage and attack speed, good at magic attribute but bad in critical attack, it fits Templar 1.5 [Normal] 3 +3 10

 
These are wielded in both hands. They will deal the most damage alone.
Attack
Speed		 Attack
Numer		 Enchant
Number		 Critical Rate
Two handed Long Sword - High damage but low attack speed, it fits Templar and Gladiator. 2.4
[Very Slow]		 3 +4 10
 
Pole - Highest physical damage but low attack speed, only Gladiator can use it. 2.8
[Very Slow]		 4 +3 50

These are wielded in both hands. They will deal the most damage alone.
Attack
Speed		 Attack
Numer		 Enchant
Number
Staff - high damage but slow attack speed, good at magic attribute, it fits Cleric and Templar 2
[Slow]		 3 +3
Book - high damage but slow attack speed, good at magic attribute, it fits Sorcerer and Spiritmaster 2
[Slow]		 1 +3
Orb - good at magic attribute 2
[Slow]		 1 +4
These are wielded in both hands. They will deal the most damage alone.
Attack
Speed		 Attack
Numer		 Enchant
Number
Bow - needs arrows 2.4
[Very Slow]		 1 +4