The Knowledge of machines and tools, including their designs, uses, repair, and maintenance, arithmetic, algebra, geometry, calculus, statistics, and their applications, 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, principles and processes for providing customer and personal services. This includes customer needs assessment, meeting quality standards for services, and evaluation of customer satisfaction, the structure and content of the English language including the meaning and spelling of words, rules of composition, and grammar.