Ключевые слова: bad, business, businessman, choice, client, communication, consumer, customer, disappointment, dislike, dissatisfied, efficiency, emoticon, emotion, evaluation, expression, feedback, feeling, finance, holding, icon, internet, investment, life events, low, marketing, negative, opinion, performance, person, poor, product, quality, questionnaire, ranking, rating, recession, reduction, reputation, result, review, sad, satisfaction, score, service, sign, survey, symbol, unhappy, user,