World Series of Poker
The World Series of Poker (WSOP) is a series of poker tournaments held annually in Las Vegas and, since 2005, sponsored by Caesars Entertainment Corporation (known as Harrah's Entertainment until 2010). It dates its origins to 1970, when Benny Binion invited seven of the best-known poker players to the Horseshoe Casino for a single tournament, with a set start and stop time, and a winner determined by a secret ballot of the seven players.
Professional Poker Tour
The Professional Poker Tour (PPT) was a series of televised poker tournaments, spinning off from the World Poker Tour (WPT) television series. It billed itself as the first professional poker league, and was limited to players who have established themselves on the World Poker Tour, World Series of Poker, or major participation on the poker circuit.