Ключевые слова: advanced, best, better, business, button, capability, capable, challenge, choice, choices, choose, choosing, competency, competent, concept, control, deciding, decision, difficult, difficulty, experience, experienced, expert, expertise, game, hard, knowledge, level, levels, mastery, mode, motivation, options, panel, pro, problem, professional, proficient, progress, progression, qualified, question, questionnaire, selection, setting, skill, skilled, skillful, skills, step, talent, talented, top, trained, training,