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Knowledge of human behaviour and performance; individual differences in ability, personality, and interests; learning and motivation; psychological research methods; and the assessment and treatment of behavioural and affective disorders.

Knowledge of the structure and content of the English language including the meaning and spelling of words, rules of composition, and grammar.

Knowledge of principles and methods for describing the features of land, sea, and air masses, including their physical characteristics, locations, interrelationships, and distribution of plant, animal, and human life.

Knowledge of principles and processes for providing customer and personal services. This includes customer needs assessment, meeting quality standards for services, and evaluation of customer satisfaction.

Knowledge of principles, methods, and procedures for diagnosis, treatment, and rehabilitation of physical and mental dysfunctions, and for career counselling and guidance.

Knowledge of circuit boards, processors, chips, electronic equipment, and computer hardware and software, including applications and programming.

Knowledge of arithmetic, algebra, geometry, calculus, statistics, and their applications.

Knowledge of administrative and clerical procedures and systems such as word processing, managing files and records, stenography and transcription, designing forms, and other office procedures and terminology.

Knowledge of historical events and their causes, indicators, and effects on civilizations and cultures.