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The Top Ten: Top 10 Selling Digital Songs, 2007

Top Selling Digital Songs, 2007 RankTitle, Artist 1. "Crank That (Soulja Boy)", Soulja Boy Tell 'Em 2. "Big Girls Don't Cry", Fergie 3. "Sweet Escape", Gwen Stefani 4. "Makes Me Wonder", Maroon 5…

Knuth, Donald Ervin

(Encyclopedia) Knuth, Donald ErvinKnuth, Donald Ervinn&oomacr;th, kən&oomacr;thˈ [key], 1938–, American mathematician and computer scientist, b. Milwaukee, Wis., grad. Case Institute of…

American Film Institute

(Encyclopedia) American Film Institute (AFI), nonprofit organization established in Washington, D.C., in 1967 by the National Endowment for the Arts to preserve and catalog American films and…

voltmeter

(Encyclopedia) voltmeter, instrument used to measure differences of electric potential, commonly called voltage, in volts or units that are multiples or fractions of volts. A voltmeter is usually…

optical character recognition

(Encyclopedia) optical character recognition (OCR), method for the machine-reading of typeset, typed, and, in some cases, hand-printed letters, numbers, and symbols using optical sensing and a…

mixer

(Encyclopedia) mixer, either of two electronic devices in which two or more signals are combined. In the type of mixer used in radio receivers, radar receivers, and similar systems, a signal is…

laminitis

(Encyclopedia) laminitislaminitislămˌənīˈtĭs [key], also called founder, inflammation of the lamina, the innermost layer of the hoof wall in horses, ponies, and donkeys. Although the condition…

multiplexing

(Encyclopedia) multiplexing, in communication, technique whereby two or more independent messages, or information-bearing signals, are carried by a single common medium, or channel. When multiplexing…

cellular telephone

(Encyclopedia) cellular telephone or cellular radio, telecommunications system in which a portable or mobile radio transmitter and receiver, or “cellphone,” is linked via microwave radio frequencies…

television

(Encyclopedia) CE5 Video transmission and reception of color and black-and-white television: The camera lens focuses collected light rays into mirrors, which separate the image into its three…