Seinfeld was a television show.
Larry Charles . Charles is best known as a staff writer for the American sitcom Seinfeld for its first five seasons , contributing some of the show 's darkest and most absurd storylines . Nielsen ratings are the audience measurement systems developed by Robert F. Elder and Louis F. Woodruff and sold to Nielsen Company , in an effort to determine the audience size and composition of television programming in the United States . Seinfeld is an American sitcom that originally ran for nine seasons on NBC , from 1989 to 1998 . In syndication , the series has been distributed by Sony Pictures Television since 2002 .