Welcome to the second part of Surviving your First MMORPG, the first part was The Basics. If you haven't chosen your MMORPG yet, please read How to Choose a MMORPG.
Careers
Every game has their own career selection, they can be called careers or classes, maybe even jobs. This is a quick generalized guide and it doesn’t apply to every game out there. Here are some of the most common types:
Archer(Ranged)
It can use a bow or not, usually their defense is not very high, but they rely on high damage level to kill their mob before they mob reaches them. They work really well at dealing quick damage when they have as warrior to tank for them.

Mage/Enchanter
This type of character might use a book or a staff and like the archer has low defense but has very high damaging attacks. If you fight a mage, they are going to use several powers to stun you and even turn your character into an animal (It happened to me, and it was not cool-_- )
I think Elementalists would also fall in the mage category, they are called that because they use Fire, Ice, Water, and/or Earth based attacks.

Summoner
This players are similar to the mage class, they can cast spells as well; but, as their name describes, th