Ключевые слова: abstract, advertisement, agreement, alphabet, block, brown, business, businessman, change, check, checkbox, checklist, choice, choosing, communication, confusion, control, design, feedback, finger, guidance, hand, icon, loss, making, mark, message, no, opportunity, quality, questionnaire, rectangle, red, referendum, rejection, shape, sign, solution, strategy, success, symbol, technology, text, thumb, uncertainty, validation, voting, wooden, yes,