Engineering and Technology — Knowledge of the practical application of engineering science and technology. This includes applying principles, techniques, procedures, and equipment to the design and production of various goods and services.  
Mechanical — Knowledge of machines and tools, including their designs, uses, repair, and maintenance.  
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.  
Mathematics — Knowledge of arithmetic, algebra, geometry, calculus, statistics, and their applications.  
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