PTB

PTB may refer to:

Government and politics

 * Bermuda Public Transportation Board
 * Bessarabian Peasants' Party (Partidul Țărănesc din Basarabia), a political party in the Kingdom of Romania
 * Brazilian Labour Party (historical) (Partido Trabalhista Brasileiro), dismantled after the 1964 military-led coup d'état
 * Brazilian Labour Party (current) (Partido Trabalhista Brasileiro), founded 1981
 * Pakistan Tobacco Board
 * Party of Labour of Burkina (Parti du Travail de Burkina), a political party in Burkina Faso
 * Physikalisch-Technische Bundesanstalt, the national metrology institute of Germany
 * Workers' Party of Belgium (Parti du Travail de Belgique), a Belgian political party

Science and medicine

 * N-Phenacylthiazolium bromide, a cross-link breaker
 * Permian-Triassic boundary, a mass extinction event
 * Phosphotyrosine-binding domain (PTB-domain), a protein domain
 * Polypyrimidine tract-binding protein, an RNA-binding protein
 * Pulmonary tuberculosis, manifestation of tuberculosis in the lungs

Technology

 * Project team builder, a project management simulator
 * Public Test Build, of the game Dead by Daylight
 * Push to break, electronics push switch
 * Packet Too Big, an ICMPv6 message; see IPv6 packet
 * Pounds of salt per thousand barrels of crude oil; see Desalter
 * .ptb, a file extension used by musical tablature authoring tool Power Tab Editor

Transport

 * Pentre-bach railway station, in Wales
 * Petit train de banlieue, a passenger train in Senegal
 * Petersburg station, an Amtrak station serving Petersburg, Virginia
 * Voepass Linhas Aéreas, a Brazilian airline
 * PTB Group, in Iran

Other uses

 * P.T.B (album), by rapcore group Kingspade
 * Placer Theatre Ballet, an American ballet company
 * Portland Trail Blazers, an American professional basketball team
 * Proto-Tibeto-Burman language
 * Proto-Torres-Banks language, a reconstructed language from Vanuatu