A. Find the missing words and tick the correct answer.
DigitalPersona grew ………. (1) an undergraduate project at the California Institute of Technology. Vance Bjorn, the company's co-founder, developed the key fingerprint-recognition algorithms in the early 1990s with fellow Caltech Student Serge Belongie, who is now an assistant professor at the University of California at San Diego. Vance came to my office to show me DigitalPersona's ………. (2) products, letting me ………. (3) one of my fingerprints using a U.are.U 4000 sensor attached to his laptop. I placed my right index finger on the sensor's glowing red window four times in quick succession so the system ………. (4) create an accurate record. After that point, it recognised my right index finger every time I put it on the sensor and consistently rejected all ………. (5) fingers and thumbs.
The system's design goal is a ………. (6) - 50,000 chance of accepting the wrong fingerprint. Vance then showed me an ………. (7) smaller sensor, dubbed the U.are.U Firefly, which is tiny enough to be incorporated into the body of a laptop or PDA. The user runs his or her finger over a half-inch-long transparent rod that rotates ………. (8) a rolling pin. As the rod turns, LED light bounces off different parts of the fingertip, creating a ………. (9) of linear images that are stitched together to form the fingerprint. When not needed for fingerprint ………. (10), the rod can be used to scroll pages up and down the screen.