PROM
Short for programmable read-only memory, a memory chip on which data can be written only once. Once a program has been written onto a PROM, it remains there forever. Unlike RAM, PROMs retain their contents when the computer is turned off.
The difference between a PROM and a ROM (read-only memory) is that a PROM is manufactured as blank memory, whereas a ROM is programmed during the manufacturing process. To write data onto a PROM chip, you need a special device called a PROM programmer or PROM burner. The process of programming a PROM is sometimes called burningthe PROM.
An EPROM (erasable programmable read-only memory) is a special type of PROM that can be erased by exposing it to ultraviolet light. Once it is erased, it can be reprogrammed. An EEPROM is similar to a PROM, but requires only electricity to be erased.
Read Also:
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Abbreviation for “parents are watching”. PRW is commonly used in newsgroups, chat rooms, instant messaging, text messaging, SMS, e-mail and other real time text-based communications.
- PSAP
Short for public safety answering point, a physical location where 911 emergency telephone calls are received and then routed to the proper emergency services. See E911.
- PSDN
Short for packet-switched data network, a data communications network that is based on the principles of packet switching, as opposed to circuit switching that is used in public telephone networks. Packet-switched networks do not establish physical communication channels between communicating devices like circuit-switched networks do. Instead, signals are formed into fixed-length packets that are affixed […]
- PSIP
(pronounced P-SIP) Acronym for Program and Systems Information Protocol, is the ATSC standard for digital television channel naming, numbering and navigation.
- PSK
Short for phase-shift keying, a modulation technique used by modems in which different phase angles in the carrier signal are used to represent the binary states of 0 and 1. The simplest method of PSK, also called biphase modulation, uses two signal phases – 0 degrees and 180 degrees. The digital signal is broken up […]