This is the common person's wizard they have some limited casting and get a familiar but this is easily the weakest caster class in the game, which makes sense it was designed for NPCs.

Role: Spell

Characteristics: Caster NPC class, they get a familiar. Woohoo!

Source: Dungeon Master's Guide

Game Rule Information

The Adept has the following game statistics.

Abilities: Strength for hitting things and Constitution for staying alive/

Alignment: Any

Hit Die: d8

Starting Gold: 6d4 x 10

Class Skills

The Adept's class skills are Concentration (Con), Craft (Int), Handle Animal (Cha), Heal (Wis), Knowledge (all skills taken individually) (Int), Listen (Wis), Profession (Wis), Search (Int), Spellcraft (Int), Spot (Wis) and Wilderness Lore (Wis).

Skill Points at 1st Level: (2 + Int modifier) × 4

Skill Points at Each Additional Level: 2 + Int modifier

Class Features

All of the following are class features of the Adept.

Weapon and Armor Proficiency: A Adept is proficient with Adepts are skilled with all simple weapons. Adepts are not proficient with any type of armor nor with shields.