DTR or similar may refer to:
Medicine Deep tendon reflex, of muscles Dietetic Technician, Registered, a clinical role in the United States
Technology Data Terminal Ready, in RS-232 modem communication Desktop replacement computer, a large laptop Digital Tape Recorder, aboard NASA's Voyager spacecraft
Other uses Deuteronomist (Dtr), hypothesised Torah author(s) Dorian Thompson-Robinson (born 1999), American football player Downtown Radio, a Northern Ireland radio station