in Las Vegas, Nevada, and the "DJ Times Expo" in Atlantic City, New Jersey. Seminars by numerous respected DJs such as John Rozz, Ray "Ray Mar" Martinez, Stacy Zemon, Mark Ferrell, Peter Merry, Randy Bartlett, and Steve Moody have helped DJs to better understand their profession, how to be more professional and to treat being a DJ as a business operation. 1991 saw the publication of Mobile Beat, a magazine geared specifically toward mobile DJs. In 1992, the Moving Picture Experts Group (MPEG), released The MPEG-1 file standard, designed to produce reasonable sound from a digital file using minimal storage. The lossy compression scheme MPEG-1 Layer-3, popularly known as MP3, later revolutionized the digital music domain. In 1998, Final Scratch debuted at the BE Developer Conference, marking the first digital DJ system to give DJs control of MP3 files through special time-coded vinyl records or CDs. While it would take some time for this novel concept to catch on with the "die hard" vinyl-oriented DJs, it was the first step in the new digital DJ revolution. Manufacturers joined with computer DJ pioneers to offer professional endorsements, the first being "Professor Jam", also known as William P. Rader, who went on to develop the industry's first dedicated computer DJ convention and learning program, the "Computerized Performance System" (CPS) known as "DJ Summit", which helped spread the word about the advantages of this emerging technology. The American Disc Jockey Awards Show was established, and its first edition was held in Las Vegas, Nevada in 1998. Since then, thirteen mobile DJs have been elected to the American Disc Jockey Hall of Fame. The thirteen members include John Rozz, Al Lampkin, Joe Martin, Robert A. Lindquist, Jon Michaels, Mike Buonaccorso, Sid Vanderpool, Bobby Morganstein, John Roberts, Ken Knotts, Ray "Ray Mar" Martinez, Cesar Cosio, and Bernie Howard-Fryman. The American Disc Jockey Awards Show annually recognized and honored individuals who had given of themselves to benefit their community or a charitable cause in the name of the ADJA or the DJ Trade as a whole.It is currently in hiatus since 2013. The "DJ of the Year" winners at the DJ Times Expo include three-time winner Marcello Pedalino, Roxanne Greene, K.C. KoKoruz, Shawn "Big Daddy" McKee, Marz Lawhorn, Gerry Siracusa, Adam Weitz, Steve Moody and Pascal Levesque who, in 2013, was the first Canadian to take part in the competition. Pascal Levesque from Québec, Canada, was