One of the largest and best-known labor unions in the US, the International Brotherhood of Teamsters has 1.4 million members. The Teamsters represents workers in some 20 industry sectors, including airlines, freight, parcel delivery, industrial trades, and public service. More than 200,000 of the union's members are employees of package delivery giant United Parcel Service. Besides negotiating labor contracts with employers on behalf of its members, the union oversees pension funds and serves as an advocate in legislative and regulatory arenas. The union and its affiliates have about 1,900 local chapters in the US and Canada, including about 475 Teamsters locals. The Teamsters union was founded in 1903.