There are many different types of jobs in Angels Online which are divided into three major groups or systems.
Combat System[edit]
The Combat System is composed of the job classes that deal physical damage, whether up-close or from afar. They wear heavy armor referred to in the game as Garment, the sole exception being the Archer class which uses leather armor referred to in the game as Mantle.
Protector[edit]
The class with the best physical defense in the game. They prove to be the most effective tanks when it comes to physical attacks due to their high defense and HP. They fight with axes or hammers and use shields to increase defense. They are quite slow, susceptible to ranged attacks (particularly that of magic due to their low magic defense), and have incredibly low MP. They have also been known as the most popular choice for the high attack of axes and one of the strongest stances in the game called panther kill 5 that will kill most lower level than you in 1 hit and same levels in 2 to 3 hits with range.
Warrior[edit]
The class with the best damage. They use dual axes or hammers to deal large amounts of damage (albeit at a slow rate) and have fairly high HP and can be a substitute tank in case a Protector is unavailable. Like Protectors, they are slow (although not as slow as Protectors are), have low MP, and are susceptible to ranged attacks.
Spearman[edit]
The class with the best damage to heavily armored enemies. Their advantage to armored foes comes with their weapons which are either spears or something relatively similar like hooks or scythes enabling them to deal damage while ignoring some if not most of an opponents armor if the proper stance is used. Unlike the Warrior or Protector, they have less defense and HP but higher MP enabling them to use skills more efficiently. They are best used in a team to help deal damage to monsters. Like all Combat System classes (the one exception being the Archer), they are susceptible to magic and ranged attacks unless a hybrid skill build is used.
Swordsmen[edit]
The class with the highest amount of speed, agility and DPS (damage-per-second), they are considered the mobile force of an army. They excel at using twin swords or daggers to deal large amounts of damage in a small amount of time. Their durability in battle is sacrificed for their great mobility and thus, should be used in a team.
Archer[edit]
The only class with a ranged physical attack, excelling at long-range combat, but utterly doomed in close range combat. They use either bows or catapults (miniaturized versions are used which look surprisingly like slingshots) along with ammunition to attack from long distances. They are considered as support fire since they can deal a large amount of damage from afar without getting hurt... that is, considering something else is keeping the target's attention away from him/her/them or a large group of them are firing at the same target. They are also the only Combat System class to use Leather armor.
They have low HP and MP but balanced defense for both physical and magic attacks. Also, should a player choose to fight alone using an Archer, they will have to employ the famous hit-and-run technique. This is surprisingly difficult seeing as the only way you can attack a monster is by 
clicking it, there is no attack command and the only way to successfully initiate an attack is by using a stance, followed immediately by a regular shot which may as well give the monster enough time to catch up... this taken into account, Archers are without a doubt, really, really fast, also you should change the mantle skill to garment so that you will have a high defence even if you are an archer.
Magic System[edit]
The Magic system is composed of the job classes that deal magical damage to enemies, heal or buff (provide positive effects) players. They wear extremely light and comfortable armor having high resistance to magic but very low resistance to physical attacks, referred to in the game as Vestment.
Summoner[edit]
They wield the most potent curse spells and summoning spells. They can also control dark forces simply with their extraordinarily strong willpower. They are almost never seen in combat without their undead familiars, able to control them due to their extraordinary will power. Whether it be skeletons, mummies, demons or whatever creature can be stirred up from the bowels of Dark City, they will loyally serve them to death (or, in this case, until they are defeated or dispelled). Their powerful curse spells and the ability to summon monsters as previously said came from learning the art of summoning and death magic which originated within Dark City.
Although they have powerful familiars, they do only a fair amount of damage and are best used to cause enemies negative buffs while their familiars do the fighting for them. This is near impossible to do, however, seeing as the only way a familiar will attack is when its master is threatened, such as when he/she attacks a monster. Although they harbor summons and curses, their offensive power is slightly weaker than others and their familiars are their strength.
Wizard[edit]
They are committed to studying chaos and relish the use of their destructive spells. They are the international symbol of damage and destruction. The class with the most powerful but energy consuming spells. Their destructive power had come from the ravaged and naturally dangerous deserts around Iron Castle city. Due to the strong nature of their power, it consumes a lot of MP, which means they must either rely on potions, be in a team as high-damage member, or possibly hope that the enemy dies before they can do much damage.
Magician[edit]
They are pure in their devotion to the arcane arts, amicable and their communication with the elves and nature is strong. The class that is known as the balance between all classes of the Magic System. They possess strong nature-based spells (though not as powerful as a wizard), some recovery spells, the ability to mislead monsters, temporarily turning them into their pets, and the spell unique to them all, their ability to turn into animals. This strong bond with the natural elements comes from their history with the ancient ancestors of Breeze Woods city. Strangely, they also possess some melee combat abilities in case their MP goes too low (albeit for lasting for a few seconds only). They don't excel in any field of magic, although they are versatile, they are best used for small parties, or if on their own, should have a pet or misled monster for help.
Priest[edit]
They are passionate about life and their faith. They can lay calming hands on you to heal even the gravest wounds, and also wield potent defensive spells, as well as life spells. The class that is the least damaging but most sought-after character, they are the support members that keep everyone alive or make them stronger than before. This strong passion for helping had come from years in studying the arts of Life from Aurora city. Even though they possess powerful healing spells, they lack power to blast a hole into monsters and can't survive very long if left on their own without help or healing.