Computers and Electronics
Knowledge of circuit boards, processors, chips, electronic equipment, and computer hardware and software, including applications and programming
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
Knowledge of the structure and content of the English language including the meaning and spelling of words, rules of composition, and grammar.
Engineering and Technology
science and technology. This includes applying principles, techniques, procedures, and equipment to the design and production of various goods and services.
Knowledge of arithmetic, algebra, geometry, calculus, statistics, and their applications.