Since 1982, the Alliance of Motion Picture and Television Producers (AMPTP) has been the trade association responsible for negotiating virtually all industry-wide guild and union contracts, including those with American Federation of Musicians (AFM); Directors Guild of America (DGA); International Alliance of Theatrical Stage Employees (IATSE); International Brotherhood of Electrical Workers (IBEW); Laborers Local 724; Screen Actors Guild-American Federation of Television and Radio Artists (SAG-AFTRA); Teamsters, Local #399; and Writers Guild of America (WGA) among others. The AMPTP, the entertainment industry's official collective bargaining representative, negotiates 58 industry-wide collective bargaining agreements on behalf of hundreds of motion picture and television producers.