Billy is a puppet that has appeared in the Saw franchise. It was used by the series' main antagonist/antihero John Kramer, a.k.a. Jigsaw, to communicate with his test subjects by delivering recorded messages, often appearing on a television screen or occasionally in person to describe the details of the sadistic traps and the means by which the test subjects could survive. Viewers have sometimes incorrectly identified the puppet itself as Jigsaw, because of its presence and connection to the killer. Many people have actually found "Billie" distressing, as the toy was meant for a child.

Although it has never actually been identified in the films, "Billy" is the name by which it is referred to by writers, directors and members of the cast and crew on documentaries and interviews. The name was given to it by its real-life creator James Wan, who is the director and co-writer of Saw. There is disagreement that the name is spelled "Billie", although Wan himself spells it "Billy".

The endurance and popularity of the Saw franchise has resulted in the production of Billy merchandise, as well as references in other media. Billy has become a type of mascot for the Saw series.

Billy may refer to:

A saw is a tool that uses a hard blade, wire, or chain with a toothed edge to cut through softer materials. A saw may be worked by hand, or powered by steam, water, electricity or other power. An abrasive saw uses a powered circular blade for cutting metal.

In a modern serrated saw, each tooth is bent to a precise angle called its set. The set of the teeth is determined by the kind of cut the saw is intended to make. For example, a rip saw has a tooth set that is similar to the angle used on a chisel. The idea is to have the teeth rip or tear the material apart. Some teeth are usually splayed slightly to each side of the blade so that the cut width (kerf) is wider than the blade itself and the blade does not bind in the cut. The kerf of the blade is adjusted with a tool called a saw tooth setter.

An abrasive saw uses an abrasive disc or band for cutting, rather than a serrated blade.

In ancient Egypt, saws made of copper are documented as early as the Early Dynastic Period, circa 3,000–2,800.^{[page needed]} Examples of saws and models of saws have been found in many contexts throughout Egyptian history. Particularly useful are tomb wall illustrations of carpenters at work that show sizes and the use of different types. Egyptian saws were set with the teeth projecting only on one side, rather than in the modern fashion with the more advantageous alternating set.

Sir James Paul McCartney, MBE, Hon RAM, FRCM (born 18 June 1942) is an English musician, singer-songwriter and composer. Formerly of the Beatles (1960–1970) and Wings (1971–1981), he has been described by Guinness World Records as "The Most Successful Composer and Recording Artist of All Time", with 60 gold discs and sales of over 100 million albums and 100 million singles. With John Lennon, George Harrison, and Ringo Starr, he gained worldwide fame as a member of the Beatles, and with Lennon formed one of the most celebrated songwriting partnerships of the 20th century. After leaving the Beatles, he began a solo career and later formed the band Wings with his first wife, Linda Eastman, and singer-songwriter Denny Laine.

According to the BBC, his Beatles song "Yesterday" has been covered by over 2,200 artists—more than any other song. Wings' 1977 release, "Mull of Kintyre", became one of the best-selling singles ever in the UK, and he is "the most successful songwriter" in UK chart history, according to Guinness. As a songwriter or co-writer, he is included on thirty-one number one titles on the Billboard Hot 100, and as of 2012 he has sold over 15.5 million RIAA certified units in the United States.

William Martin "Billy" Joel (born May 9, 1949) is an American pianist, singer-songwriter, and composer. Since releasing his first hit song, "Piano Man," in 1973, Joel has become the sixth best-selling recording artist and the third best-selling solo artist in the United States, according to the RIAA.

Joel had Top 40 hits in the 1970s, 1980s, and 1990s, achieving 33 Top 40 hits in the United States, all of which he wrote himself. He is also a six-time Grammy Award winner, a 23-time Grammy nominee and has sold over 150 million records worldwide. He was inducted into the Songwriter's Hall of Fame (1992), the Rock and Roll Hall of Fame (1999), the Long Island Music Hall of Fame (2006), and the Hit Parade Hall of Fame (2009). In 2008, Billboard magazine released a list of the Hot 100 All-Time Top Artists to celebrate the US singles chart's 50th anniversary, with Billy Joel positioned at No. 23. With the exception of the 2007 songs "All My Life" and "Christmas in Fallujah," Joel stopped recording pop/rock material after 1993's River of Dreams, but he continued to tour extensively until 2010.