"Occupational safety and health" . "Zoonoses" . "Network protocols" . "Hypertext Transfer Protocol" . "World Wide Web" . "Internet protocols" . "World Wide Web Consortium standards" . "Sleep surgery" . "Otorhinolaryngology" . "Trachea surgery" . "Application layer protocols" . "Viral respiratory tract infections" . "Emergency medical procedures" . "Airway management" . "COVID-19" . "Computer-related introductions in 1991" .