| 单词 | personal digital assistant | |||
| 释义 | personal digital assistantpersonal digital assistantpersonal digital assistantper′sonal dig′ital assis′tantn.
personal digital assistantpersonal digital assistant(PDA), lightweight, hand-held computercomputer,device capable of performing a series of arithmetic or logical operations. A computer is distinguished from a calculating machine, such as an electronic calculator, by being able to store a computer program (so that it can repeat its operations and make logical ..... Click the link for more information. designed for use as a personal organizer with communications capabilities; also called a handheld. A typical PDA has no keyboard, relying instead on special hardware and pen-based computerpen-based computer, computer that uses software to enable it to accept handwriting or drawing as a form of input. A stylus, which may contain special electronic circuitry, may be used to write on the computer display or on a separate tablet. ..... Click the link for more information. software to enable the recognition of handwritten input, which is entered on the surface of a liquid crystalliquid crystal, liquid whose component particles, atoms or molecules, tend to arrange themselves with a degree of order far exceeding that found in ordinary liquids and approaching that of solid crystals. ..... Click the link for more information. display screen. In addition to including such applications as a word processor, spreadsheet, calendar, and address book, PDAs are used as notepads, appointment schedulers, and wireless communicators for sending and receiving data, faxes, and electronic-mail messages. Introduced in 1993, PDAs achieved only modest acceptance during the remainder of the decade due to their relatively high price and limited applications, but improved software and lower prices subsequently led to more widespread use. In the early 21st cent., however, smartphones (see cellular telephonecellular telephone or cellular radio, telecommunications system in which a portable or mobile radio transmitter and receiver, or "cellphone," is linked via microwave radio frequencies to base transmitter and receiver stations that connect the user to a conventional ..... Click the link for more information. ) equipped with a wide range of applications supplanted PDAs. See also palmtoppalmtop 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 a small, full color, liquid-crystal display for output. ..... Click the link for more information. . personal digital assistant[‚pərs·ən·əl ‚dij·əd·əl ə′sis·tənt]Personal Digital Assistant(computer)The Apple Newton was a fairly early example. personal digital assistantassistant[ah-sis´tant]per·son·al dig·i·tal as·sis·tant(PDA) (pĕr'sŏn-ăl dij'i-tal ā-sis'tănt)personal digital assistant,PDApersonal digital assistant
Synonyms for personal digital assistant
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personal digital assistant - a lightweight consumer electronic device that looks like a hand-held computer but instead performs specific tasks; can serve as a diary or a personal database or a telephone or an alarm clock etc.