Key Terms – Chapter 2 from Enhanced A+ Guide to Managing and Maintaining Your PC Enhanced Third Edition by Jean Andrews Richard Goldman

PCI Peripheral Component Interconnect White color slots Standard – 33Mhz, 32-bit data bus Rev 21. – 66MHz, 64-bit data bus

IRQ Interrupt Request

ISA Industry Standard Architecture Black slots 8 or 16-bit data bus

MCA MicroChannel Architecture IBM proprietary bus 32-bit data bus

VESA Video Electronics Standards Association Primarily for video or memory expansion cards. VL bus

AGP Accelerated Graphics Port 32-bit data bus

AMR Audio Modem Riser Moves analog I/O functions of modem circuitry to a small board that pugs into the mother board.

CNR Communications Network Riser

POST Power On Self Test

I/O Address Input/Output Address Used to identify each device connected to a PC.

TSR Terminate and Stay Resident Programs that are loaded into memory and remain there.