Computers and Electronics
Knowledge of circuit boards, processors, chips, electronic equipment, and computer hardware and software, including applications and programming.
Mathematics
Knowledge of arithmetic, algebra, geometry, calculus, statistics, and their applications.
Repairing
Repairing machines or systems using the right tools.
Troubleshooting
Figuring out what is causing equipment, machines, wiring, or computer programs to not work.
Mechanical
Knowledge of machines and tools, including their designs, uses, repair, and maintenance.
Education and Training
Knowledge of principles and methods for curriculum and training design, teaching and instruction for individuals and groups, and the measurement of training effects.