Ключевые слова: academic, academy, background, business, categorize, category, class, classification, classified, course, criteria, education, first, function, grade, graduation, hierarchy, information, item, learning, lesson, management, marketing, online, performance, place, position, product, promote, quality, rank, ranking, rating, report, result, sale, school, score, search, service, social, sort, status, strategy, student, study, success, teacher, tutorial, word,