Dell External OEMR 2970 User Guide - Page 205

PCI Abbreviation for Peripheral Component Interconnect. A standard for local-bus implementation developed by Intel Corporation. PCMCIA Personal Computer Memory Card International Association. An international trade association that has developed standards for devices, such as modems and external hard drives, that can be plugged into portable computers. PERC Acronym for Dell PowerEdge™ Expandable RAID controller. peripheral device An internal or external device-such as a printer, a disk drive, or a keyboard-connected to a computer. PGA Abbreviation for pin grid array, a type of microprocessor socket that allows you to remove the microprocessor chip. physical memory array The physical memory array is the entire physical memory of a system. Variables for physical memory array include maximum size, total number of memory slots on the motherboard, and total number of slots in use. physical memory array mapped The physical memory array mapped refers to the way physical memory is divided. For example, one mapped area may have 640 KB and the other mapped area may have between 1 megabyte and 127 megabytes. PIC Acronym for programmable interrupt controller. PIP Acronym for peripheral interchange program. A CP/M utility program that was used to copy files. pixel A single point on a video display. Pixels are arranged in rows and columns to create an image. A video resolution, such as 640 x 480, is expressed as the number of pixels across by the number of pixels up and down. PLCC Acronym for plastic leaded chip carrier. Plug and Play An industry-standard specification that makes it easier to add hardware devices to personal computers. Plug and Play provides automatic installation and configuration, compatibility with existing hardware, and dynamic support of mobile computing environments. PME Abbreviation for Power Management Event. A PME is a pin on a peripheral component interconnect that allows a PCI device to assert a wake event. POST Acronym for power-on self-test. Before the operating system loads when you turn on your computer, the POST tests various system components such as RAM, the disk drives, and the keyboard. power supply An electrical system that converts AC current from the wall outlet into the DC currents required by the computer circuitry. The power supply in a personal computer typically generates multiple voltages. power unit A set of power supplies in a system chassis. ppm Abbreviation for pages per minute. PQFP Abbreviation for plastic quad flat pack, a type of microprocessor socket in which the microprocessor chip is permanently mounted. Glossary 205