Ключевые слова: 404, abstract, access, alert, attention, background, brick, broken, business, change, code, communication, computer, concept, concrete, connection, data, design, document, education, error, failure, found, information, information technology, internet, it, link, maintenance, malfunction, message, missing, navigation, object, page, problem, school, search, sign, site, support, technology, text, trouble, wall, warning, web, website, wrong, www,