The General Confederation of the Portuguese Workers (Portuguese: Confederação Geral dos Trabalhadores Portugueses or CGTP) is the largest trade union federation in Portugal. It was founded informally in 1970, emerged publicly after the Carnation Revolution in 1974 and was legalised the following year by the National Salvation Junta. Affiliates National Union of Local Administration Workers - STAL Lisbon Telecommunications and Audiovisual Communication Workers Union - STT Lisbon Union of Customs Workers in Brokers and Companies Lisbon Union of Agricultural Workers and the Food, Beverage and Tobacco Industries of Portugal - SINTAB Lisbon Union of Technical Agents of Architecture and Engineering - SATAE Lisbon Union of Financial Activity Workers - SINTAF Lisbon Union of Aviation and Airport Workers - SIAVA Lisbon Union of Workers of Caixa Geral de Depósitos Group Companies - STEC Lisbon Union of Captains, Officers, Pilots, Commissioners and Engineers of the Merchant Marine - OFFICIALMAR Lisbon Southern Meat Industry Workers Union Lisbon Union of Workers in the Ceramic, Cement and Similar Industries of the South and Autonomous Regions Lisbon Union of Commerce Workers, Offices and Services of Portugal - CESP Lisbon Union of Construction, Timber, Marble and Cork Workers of the South Lisbon National Union of Postal and Telecommunications Workers - SNTCT Lisbon National Union of Electrical Industries of the South and Islands - SIESI Lisbon Portuguese Nurses Union - SEP Lisbon Show Workers Union - STE Lisbon Union of Civil Workers of the Armed Forces, Manufacturing Establishments and Defense Companies - STEFFA'S Lisbon National Union of Railway Sector Workers - SNTSF Lisbon Union of Public Service Workers of the South and Azores - STFPSA Lisbon Union of Judicial Employees - SFJ Lisbon Union of Workers in the Industry of Hospitality, Tourism, Restaurants and Similar in the South Lisbon Professional Football Players Union Lisbon Union of Merchant Marine Workers, Travel Agencies, Freight Forwarders and Fisheries - SIMAMEVIP Lisbon South Zone Physicians Union Lisbon National Union of Veterinarians Lisbon Union of Workers in Manufacturing Industries, Energy and Environmental Activities in the Centre, South and Autonomous Regions - SITE CSRA Lisbon Mining Industry Workers Union Lisbon Lisbon Municipality Workers Union - STML Lisbon Musicians Union Lisbon Free Trade Union of Fishermen and Related Professions Lisbon Union of Concierge, Surveillance, Cleaning, Household and Miscellaneous Activities Workers Lisbon Greater Lisbon Teachers Union - SPGL Lisbon National Psychologists Union Lisbon Union of Drawing Staff and Technicians - SQTD Lisbon National Union of Telecommunications