Apps2SD

Move Applications a phone's SD card instead of internal memory.

Nandroid

A utility, accessible through Recovery Mode, that allows you to backup a phone and restore to the exact condition at backup.

Cupcake

A development branch of the Android OS that contains many improvements that was merged into the master build of Android and is currently being released to new phones as Android 1.5.

ADP

The Android Dev Phone (ADP) is a SIM-unlocked and hardware-unlocked Android device that is designed for advanced developers.

RC

Release Candidate

Recovery Mode

This mode allows users to perform a NANDroid backup, access a command line and flash a phone with an update.zip file.

Bootloader

The SPL and IPL of a flash based device.

Root

It allows users to have complete access to the underlying OS of a linux or nix based machine.