Flash-memory meaning

(1) For Adobe's multimedia authoring and playback system, see Flash.
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A type of memory that is used in digital cell phones, digital cameras, personal digital assistants, and PC cards for notebook computers. Flash memory is constantly on. It can be erased and reprogrammed in units of memory called blocks. The term takes its name from the memory’s design, which allows a section of memory cells to be erased in one action, or in a flash. Flash memory is a popular product that is sold by semiconductor companies.
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A type of non-volatile read-only memory (ROM) that can store data or programs, be erased, and be used again. Flash memory must be erased in blocks, rather than a byte at a time, which limits its use to applications such as a supplement to or replacement for a mechanical hard disk drive. Flash memory is unsuitable for use as main memory, or random access memory (RAM). See also RAM and ROM.
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(computer hardware) A rewritable memory chip that retains its data without a power supply.
noun
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Nonvolatile random access memory that can be erased electronically and rewritten up to 100,000 times. It is smaller, lighter, and more energy efficient than a hard drive, making it particularly useful in handheld devices.
noun
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A kind of ROM that retains data when power is turned off and that can be electronically erased and reprogrammed without being removed from the circuit board.
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