Classes
A character's class determines much about the character, their skills, their blindspots, and so forth.
Class Format
Name
This defines the name of the Class or Class Kit.
Group
This determines the Hit Dice size, HP progression above Level 10, thac0 and Saving Throw progression of the character. For example, a Bard is considered a Rogue class, despite being able to cast spells.
Types
This determines what Skill Groups the character considers Class Skills; these are General, Martial, Cunning, Academic, Spiritual
Hit Dice
This determines the size of the character's Hit Dice, regardless of how it is modified (1/2 HD) or how many levels they have (a Level 6 character has 6 HD). Despite being almost always determined by Class, it is listed here for convenience. Some Classes do differ in regards to Group - Barbarians notably have a d12 Hit Dice.
thac0
This determines the characters thac0 and the rate at which it progresses. Despite being almost always determined by Class, it is listed here for convenience.
Hit-Dice
Combat Proficiency Points (how many at 1st level and rate of gain)
Skill Points (how many at 1st level, and rate of gain)
Combat Proficiencies (begun with)
Skill Proficiencies (begun with)
Traits
Special Skills (starting and progression - includes mention of caps on spending if character can spend points on these)
Starting Equipment
This is then followed by three tables -
Table 1 stuff: Level XP for Level HP (lists hit-dice and up) Thac0 Attacks Opportunity Actions Saves
Table 2 Stuff Level XP for Level Combat Proficiency Points Skill Proficiency Points Special Skill Progression (if any) Table 2 changes to reflect unique class features, like Attacks per Round, Turn Undead level, Total Thief Points or Special Skills levels, Backstab Severity
Table 3 Stuff Level XP for Level Class Features
Table 3+ Stuff Additional Tables may be used if a character has a significant Table 2 already. These include tables that show spell progression - tables for Turn Undead are now contained in the Abilities section.
(warrior skills = martial, rogue skills = guile, wizard skills = academic, priest skills = spiritual)
Class Template
This is then followed by the following standard tables. These may be modified depending on the Class.