Columbia Encyclopedia

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palmtop

(Encyclopedia)palmtop or hand-held personal computer, lightweight, small, battery-powered, general-purpose programmable computer. It typically had a miniaturized full-function, typewriterlike keyboard for input and...

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 computer. The light re...

Mathews, Max Vernon

(Encyclopedia)Mathews, Max Vernon, 1926–2011, American engineer known as the father of computer music, b. Columbus, Nebr., grad. California Institute of Technology (B.S., 1950), Massachusetts Institute of Technol...

electronic mail

(Encyclopedia)electronic mail or e-mail, the electronic transmission of messages, letters, and documents. In its broadest sense electronic mail includes point-to-point services such as telegraph and facsimile (fax)...

Year 2000 problem

(Encyclopedia)Year 2000 problem, Y2K problem, or millennium bug, in computer science, a design flaw in the hardware or software of a computer that caused erroneous results when working with dates beyond Dec. 31, 1...

digital-to-analog conversion

(Encyclopedia)digital-to-analog or D/A conversion, the process of changing discrete digital data into a continuously varying signal in relation to a standard or reference. There are two types of converters: electro...

desktop publishing

(Encyclopedia)desktop publishing, system for producing printed materials that consists of a personal computer or computer workstation, a high-resolution printer (usually a laser printer), and a computer program tha...

Engelbart, Douglas Carl

(Encyclopedia)Engelbart, Douglas Carl, 1925–2013, American engineer and inventor, b. Portland, Oreg., Ph.D Univ. of California, Berkeley, 1955. He was a radar technician in the navy during World War II and an ele...

data processing

(Encyclopedia)data processing or information processing, operations (e.g., handling, merging, sorting, and computing) performed upon data in accordance with strictly defined procedures, such as recording and summar...

magnetic core

(Encyclopedia)magnetic core: see computer.