A character's "class" is that character's occupation(s). The following classes are available:
Class Maximum Stats
Each class has a maximum that you can reach when you add magical gear.
For example, a Ranger can have 25 DEX with gear, whilst a Warrior can only have 22.
CON, LUC, INT and WIS are a maximum of 25 for all classes.
Your 'primary class' is determined by the highest class you have.
Example: The primary class of [Ra(12) Cl(15)] is Cleric.
When both classes are equal the first listed is Primary.
Example: The primary class of [Ra(12) Cl(12)] is Ranger.
You will also hear people refer to being '<class>-prime'. The examples above are 'Cleric-prime' and 'Ranger-prime', respectively.
Chart - Geared stat maximums, per class
-*Half-ogres and Giants have a natural racial maximum STR of 21, therefore it is possible for these races to reach 21 STR, regardless of class.