AC

Alternating current

Amps

Amperes

ATAG

ARM tags, though now used by boot loaders for other architectures

AVC

Advanced Video Coding (MPEG-4)

AVR

Wikipedia states that “it is commonly accepted that AVR stands for Alf (Egil Bogen) and Vegard (Wollan)’s RISC processor.”

BCD

Binary-coded decimal

Brick

To accidently render a device unusable by making changes to it

CEA

Consumer Electronics Association

cond

Condition variable

CPU

Central processing unit

CRC

Cyclic redundancy check, a type of hash for error detection

CVT

Coordinated Video Timings standard (replaces GTF)

daemon

A Unix process that services requests in the background

DC

Direct current

DCD

RS-232 data carrier detect

DCE

RS-232 data communications equipment

Distro

A specific distribution of Linux software

DLNA

Digital Living Network Alliance, whose purpose is to enable sharing of digital media between multimedia devices

DMM

Digital multimeter

DMT

Display Monitor Timing standard

DPI

Display Pixel Interface (a parallel display interface)

DPVL

Digital Packet Video Link

DSI

Display Serial Interface

DSR

RS-232 data set ready

DTE

RS-232 data terminal equipment

DTR

RS-232 data terminal ready

ECC

Error-correcting code

EDID

Extended display identification data

EEPROM

Electrically erasable programmable read-only memory

EMMC

External mass media controller

Flash

Similar to EEPROM, except that large blocks must be entirely rewritten in an update operation

FFS

Flash file system

FIFO

First in, first out

FSP

Flash storage processor

FTL

Flash translation layer

FUSE

Filesystem in Userspace (File system in USErspace)

GNU

GNU is not Unix

GPIO

General-purpose input/output

GPU

Graphics processing unit

GTF

Generalized Timing Formula

H.264

MPEG-4 Advanced Video Coding (AVC)

H-Bridge

An electronic circuit configuration that allows voltage to be reversed across the load

HDMI

High-Definition Multimedia Interface

HID

Human interface device

I2C

Two-wire interface invented by Philips

IC

Integrated circuit

IDE

Integrated development environment

IR

Infrared

ISP

Image Sensor Pipeline

JFFS2

Journalling Flash File System 2

LCD

Liquid-crystal display

LED

Light-emitting diode

mA

Milliamperes, a measure of current flow

MCU

Microcontroller unit

MMC

MultiMedia Card

MISO

Master in, slave out

MOSI

Master out, slave in

MTD

Memory technology device

mutex

Mutually exclusive

NTSC

National Television System Committee (analog TV signal standard)

PAL

Phase Alternating Line (analog TV signal standard)

PC

Personal computer

PCB

Printed circuit board

PLL

Phase-locked loop

PoE

Power over Ethernet (supplying power over an Ethernet cable)

POSIX

Portable Operating System Interface (for Unix)

pthreads

POSIX threads

PWM

Pulse-width modulation

Pxe

Preboot execution environment, usually referencing booting by network

RAM

Random-access memory

RI

RS-232 ring indicator

RISC

Reduced instruction set computer

RH

Relative humidity

ROM

Read-only memory

RPi

Raspberry Pi

RS-232

Recommended standard 232 (serial communications)

RTC

Real-time clock

SBC

Single-board computer

SD

Secure Digital Association memory card

SDIO

SD card input/output interface

SDRAM

Synchronous dynamic random-access memory

SoC

System on a chip

SMPS

Switched-mode power supply

SPI

Serial Peripheral Interface (bus)

Stick parity

Mark or space parity, where the bit is constant

TWI

Two-wire interface

UART

Universal asynchronous receiver/transmitter

USB

Universal Serial Bus

V3D

Video for 3D

VAC

Volts AC

VESA

Video Electronics Standards Association

VFS

Virtual file system

VNC

Virtual Network Computing

VSB

ATX standby voltage

YAFFS

Yet Another Flash File System