TR or tr may stand for:
Transport Layer Security (TLS), and its now-deprecated predecessor, Secure Sockets Layer (SSL), are cryptographic protocols designed to provide communications security over a computer network.
Paul Michael Levesque (born July 27, 1969), better known by the ring name Triple H, is an American business executive, professional wrestler, and actor.
A trademark, trade mark, or trade-mark is a recognizable sign, design, or expression which identifies products or services of a particular source from those of others, although trademarks used to identify services are usually called service marks.
Tramadol, sold under the brand name Ultram among others, is an opioid pain medication used to treat moderate to moderately severe pain.
Trinidad and Tobago ( (listen), ), officially the Republic of Trinidad and Tobago, is a twin island country that is the southernmost nation of the West Indies in the Caribbean.
Translation is the communication of the meaning of a source-language text by means of an equivalent target-language text.
In mathematics, the trigonometric functions (also called circular functions, angle functions or goniometric functions) are real functions which relate an angle of a right-angled triangle to ratios of two side lengths.