- Mathematics - Knowledge of arithmetic, algebra, geometry, calculus, statistics, and their applications.
- Mechanical - Knowledge of machines and tools, including their designs, uses, repair, and maintenance.
- Building and Construction - Knowledge of materials, methods, and the tools involved in the construction or repair of houses, buildings, or other structures such as highways and roads.
- Production and Processing - Knowledge of raw materials, production processes, quality control, costs, and other techniques for maximizing the effective manufacture and distribution of goods.
- Design - Knowledge of design techniques, tools, and principles involved in production of precision technical plans, blueprints, drawings, and models.