Labor is generally categorized into unskilled, semi-skilled, and skilled. Unskilled labor is that which does not require any skill or education and that can be performed by almost anyone. Unskilled labor tends to focus on physical labor as opposed to mental labor. Semi-skilled labor requires some skills and education but not as much as skilled labor. Skilled labor requires extensive education, such as a college degree, with jobs that are in need of judgment, decision-making, and complex thought.