Continental Airlines is testing a system that allows passengers to use their cellphone or personal-digital assistant (PDA) instead of a regular boarding pass. During the test being conducted in Huston, Continental and the Transportation Security Administration (TSA) will allow passengers to present a code the airline has sent to their cellphone or PDA. According to USATODAY.com "The two-dimensional bar code, a jumble of squares and rectangles, stores the passenger's name and flight information. A TSA screener will confirm the bar code's authenticity with a handheld scanner. Passengers still need to show photo identification. The electronic boarding pass also works at airport gates."