Initialism of return the favour. / (aviation) Initialism of return to flight.

Initialism of real time factor. / (computing) Initialism of Rich Text Format. / Initialism of residential treatment facility.

(computing) Abbreviation of release to manufacturing: a stage in the software release life cycle

(US) Initialism of Registry of Toxic Effects of Chemical Substances.

(military) Initialism of return to base.

(photography, graphic design) Alternative form of RTL (right to left)

Initialism of radioisotope thermoelectric generator (a device that generates electricity from the natural decay of radioactive material). / (aviation) Abbreviation of radiotelegraph.

Initialism of Radeon Technology Group (a division of Advanced Micro Devices (AMD), who produces a brand of computer products). / Initialism of Radio Télévision Guinéenne (a public broadcaster in Guinea).

Initialism of rapid thermal processing. / Initialism of Real-time Transport Protocol. / Abbreviation of ribavirin triphosphate.

Initialism of radio and television arts. / Initialism of road traffic accident. / (video games) Initialism of real-time attack. / (medicine) Initialism of renal tubular acidosis.