Useful english dictionary. 2012.
Airy disk — Computer generated image of an Airy disk. The gray scale intensities have been adjusted to enhance the brightness of the outer rings of the Airy pattern … Wikipedia
diffraction disk — noun : spurious disk … Useful english dictionary
Magnitude (astronomy) — For other uses, see Magnitude (disambiguation). Magnitude is the logarithmic measure of the brightness of an object, in astronomy, measured in a specific wavelength or passband, usually in optical or near infrared wavelengths. Contents 1… … Wikipedia
dawes' limit — ˈdȯz(ə̇z) noun Usage: usually capitalized D Etymology: after William R. Dawes died 1868 English astronomer : an approximate value of the resolving power of a telescope based on the theoretical size of the spurious disk being equal in seconds of… … Useful english dictionary
Intel 8259 — The Intel 8259 is a family of Programmable Interrupt Controllers (PICs) designed and developed for use with the Intel 8085 and Intel 8086 8 bit and 16 bit microprocessors. The family originally consisted of the 8259, 8259A, and 8259B PICs, though … Wikipedia
Interrupt — This article is about computer interrupts. For the study of the effect of disruptions on job performance, see Interruption science. In computing, an interrupt is an asynchronous signal indicating the need for attention or a synchronous event in… … Wikipedia
Crystal oscillator — A miniature 4 MHz quartz crystal enclosed in a hermetically sealed HC 49/US package, used as the resonator in a crystal oscillator. A crystal oscillator is an electronic oscillator circuit that uses the mechanical resonance of a vibrating crystal … Wikipedia
Phase-locked loop — PLL redirects here. For other uses, see PLL (disambiguation). A phase locked loop or phase lock loop (PLL) is a control system that generates an output signal whose phase is related to the phase of an input reference signal. It is an electronic… … Wikipedia
computer — computerlike, adj. /keuhm pyooh teuhr/, n. 1. Also called processor. an electronic device designed to accept data, perform prescribed mathematical and logical operations at high speed, and display the results of these operations. Cf. analog… … Universalium
Gramophone record — A 12 inch (30 cm) 33⅓ rpm record (left), a 7 inch 45 rpm record (right), and a CD (above) A gramophone record, commonly known as a phonograph record (in American English), vinyl record (in reference to vinyl, the material most commonly used after … Wikipedia
