The Writers Guild of America is the joint efforts of two different US labor unions:
The Writers Guild of America, East (WGAE), representing TV and film writers East of the Mississippi.
The Writers Guild of America, West (WGAW), representing TV and film writers in Hollywood and Southern California.
The WGAE and WGAW negotiate contracts in unison as well as launch strike actions simultaneously:
2007–08 Writers Guild of America strike
Effect of the 2007–08 Writers Guild of America strike on television, a list of television shows affected by the strike
1988 Writers Guild of America strike
1985 Writers Guild of America strike
1981 Writers Guild of America strike
1960 Writers Guild of America strike
Although each Guild runs independently, they perform some activities in parallel:
Writers Guild of America Award, an annual awards show with simultaneous presentations on each coast
WGA screenwriting credit system, determines how writers' names are listed during the credits
WGA script registration service, online services to prove when scripts were written and by whom
International Affiliation of Writers Guilds (IAWG), an international labor federation both Guilds belong to
