R.T, es un Grupo de música de Chile

Radiation therapy or radiotherapy

Rapid transit

Reverse transcriptase, an enzyme that transcribes RNA to DNA

RT Sacramento Regional Transit District

Respiratory therapist; see Respiratory therapy

Rooster Teeth Productions, a machinima production group known for the series Red vs. Blue

Rotten Tomatoes, a movie reviewing website.

Runtime, in computer science

Radio Times, BBC's programme listings magazine

IBM RT, or RT PC, a computer

Room temperature, in chemistry

Ras Tanura, a city in Saudi Arabia

RT (bus), a bus made for London Transport between the 1930s and 1950s

Reaction time, in psychology

Ralink Technology, a Wi-Fi chipset manufacturer from Taiwan

Request Tracker, an open-source ticketing system

R/T, a performance moniker for cars

RT!, a Canadian music video director

RT (energy), the product of the gas constant (R) and temperature

Reform Treaty, of the European Union

Radiologic technologist; see also Radiography

Russia Today TV, more often known as Russia Today is a global English-language news channel from Russia.

Scarborough RT (TTC), a Rapid Transit line owned by the Toronto Transit Commission