There are 27 skills in Morrowind, each of which determines how well you can perform various tasks. Each skill is governed by an attribute; there are three to five skills governed by each attribute (except Luck). Each class has five major skills, five minor skills, and seventeen miscellaneous skills. Each time your character increases any combination of major or minor skills ten times, they become eligible to gain a level. Each skill also belongs to one of three specializations. The numbers in parentheses are what the game uses to identify the skill. Skills are raised by using them, by paying for trainers, by reading skill books, and occasionally as quest rewards. Skills can be permanently damaged (though retrainable) by jail time, and – in theory – by the Damage Skill effect, though the latter is not encountered as an effect used against the player character except in early, unpatched versions of the game.
The base starting value of each skill is 5, but player choices regarding race and class modify those starting values. Each of the five major skills receive +25, and each of the five minor skills receive +10. Each skill governed by the character's chosen Specialization receives an additional +5. Each Race receives additional bonuses to starting skill levels. The highest possible starting value for a skill is 50.