TR or tr may stand for:
Tramadol, sold under the brand name Ultram among others, is an opioid pain medication used to treat moderate to moderately severe pain.
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.
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.
Translation is the communication of the meaning of a source-language text by means of an equivalent target-language text.
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.
Paul Michael Levesque (born July 27, 1969), better known by the ring name Triple H (an abbreviation of his original WWE ring name Hunter Hearst Helmsley), is an American business executive, professional wrestler, and actor.
A trade union, also called a labour union or labor union (US), is an organization of workers who have come together to achieve many common goals, such as protecting the integrity of their trade, improving safety standards, and attaining better wages, benefits (such as vacation, health care, and retirement), and working conditions through the increased bargaining power wielded by the creation of a monopoly of the workers.
In mathematics, the trigonometric functions (also called circular functions, angle functions or goniometric functions) are functions of an angle.