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.

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

(computing) Initialism of run-time type information. / (computing) Initialism of run-time type identification.

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

(military) Initialism of return to base.

(computing) Real Time Streaming Protocol: a network protocol designed for use in entertainment and communications systems to control streaming media servers.

(computing) Initialism of Real Time Messaging Protocol. / (computing) Initialism of Routing Table Maintenance Protocol. / Initialism of Royal Tyrrell Museum of Palaeontology.

plural of RTM

Initialism of retrotrapezoid nucleus.