Characters also each had a Primary Skill Area (PSA—Military, Technological, or Biosocial) which allowed them to buy skills that fell into their PSA at a discount. Skills were rated from 1–6 and usually consisted of a set of subskills that gave a chance for accomplishing a particular action as a base percentage plus a 10% bonus for each skill level the character had in the skill. Weapon skills were based on the character's relevant attribute (Dexterity or Strength) but other skills had a base chance of success independent of the character's attributes. Many of the technological skills were penalized by the complexity of the robot, security system, or computer the character was attempting to manipulate (also rated from 1 to 6).