Ключевые слова: 404, accident, alarm, available, beware, careful, caution, connection, cyberspace, danger, dangerous, database, depression, disconnect, engineer, error, error 404, exclamation, fail, firewall, insurance, laptop, maintenance, mistake, network, notice, oops, password, problem, process, program, repair, safety, security, service, signs, stop, support, symbol, system, technical, technology, trouble, update, upgrade, virus, warn, web, web page, website,