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CDMA One: The name used by the CDMA Development Group (CDG) for CDMA networks (IS-95) using 2nd-generation digital technology.

Ozone (O3): A nearly colorless gas and a form of oxygen (O2). It is composed of an oxygen molecule made up of three oxygen atoms instead of two.

Ozone: A triatomic (O3) form of oxygen that is formed in the stratosphere when sunlight strikes oxygen atoms. This atmospheric ozone helps filter radiation from the sun.

Overtone: Similar in concept to a harmonic. Overtones are sounds produced by an instrument (or sound source) that are higher in frequency than the fundamental frequency. They may or may not coincide w . . . View Full Definition

Ozone Layer: An atmospheric layer that contains a high proportion of oxygen that exists as ozone. It acts as a filtering mechanism against incoming ultraviolet radiation. It is located between the tropos . . . View Full Definition

Overhead Boom Microphone: Held on a long arm by a boom operator, positioned above the actors' heads and out of view of the camera, it is equipped with a hypercardioid microphone so that sound from the direction it is . . . View Full Definition

Pardoner: An individual licensed by the medieval church to sell papal indulgences (i.e., 'pardons'), official documents excusing the recipient from certain acts of penitence and alleviating the sinner . . . View Full Definition

Peripheral Component Interconnect (PCI): A local bus standard developed by Intel Corporation. Most modern PCs include a PCI bus in addition to a more general ISA expansion bus. Many analysts, however, believe that PCI will eventual . . . View Full Definition

Phenidone: Reducing agent used in many fine grain solutions.

Pelagic Zone: One of the two basic subdivisions of the marine biome; consists of the water above the sea fioor and its organisms.