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Abbreviations

When unusual abbreviations appear in this developer note, the corresponding terms are also spelled out. Standard units of measure and other widely used abbreviations are not spelled out.

Here are the standard units of measure used in developer notes:

A amperes lb. pounds
dB decibels mA milliamperes
bps bits per second A microamperes
GB gigabytes MB megabytes
Hz hertz Mbps megabits per second
in. inches MHz megahertz
k 1000 mm millimeters
K 1024 ms milliseconds
KB kilobytes s microseconds
kbps kilobits per second ns nanoseconds
kg kilograms sec. seconds
kHz kilohertz V volts
k kilohms W watts

Other abbreviations used in developer notes include these:

$n hexadecimal value n
ADB Apple Desktop Bus
ATA advanced technology attachment
ATAPI advanced technology attachment with packet interface
AV audio/visual
BIOS basic input/output system
CAS column address strobe
CD-ROM compact disc read-only memory
CRM Communications Resource Manager
DAC digital to analog converter
DDC display data channel
DIMM dual inline memory module
DIN Deutsche Industrie Norm
DMA direct memory access
DRAM dynamic random-access memory
DVD digital video disc, also referred to as digital versatile disc
EDO extended data out DRAM device type
EMI electromagnetic interference
GCR group code recording
HID human interface device, a class of USB devices
IC integrated circuit
IIC inter-integrated circuit (an internal control bus)
I/O input/output
IR infrared
IrDA Infrared Data Association
ISO International Organization for Standardization
JEDEC Joint Electronics Devices Engineering Council
L2 level 2, used in reference to level of cache
LVD or
LVDS
low voltage differential signaling
Mac OS Macintosh operating system
MESH Macintosh enhanced SCSI hardware
MMU memory management unit
MPEG Motion Picture Experts Group
NTSC National Television Standards Committee (the standard system used for broadcast TV in North America and Japan)
PAL Phase Alternating Line system (the standard for broadcast TV in most of Europe, Africa, South America, and southern Asia)
PCI Peripheral Component Interconnect
PGA pin grid array
PIO parallel input output
RAM random-access memory
RAS row address strobe
RAVE Rendering Acceleration Virtual Engine
RGB a video signal format with separate red, green, and blue components
RISC reduced instruction set computing
ROM read-only memory
SCSI Small Computer System Interface
SCC serial communications controller
SDRAM synchronous dynamic random-access memory
SECAM the standard system used for broadcast TV in France and the former Soviet countries
SGRAM synchronous graphics random-access memory
SO-DIMM small outline dual inline memory module
SRAM static random-access memory
S-video a type of video connector that keeps luminance and chrominance separate; also called a Y/C connector
USB Universal Serial Bus
VRAM video RAM; used for display buffers
Y/C a type of video connector that keeps luminance and chrominance separate; also called an S-video connector
YUV a video signal format with separate luminance and chrominance components


\xA9 1998 Apple Computer, Inc. — (Last Updated 5 Jan 99)

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