The 1602A LCD Serial Backpack is a ATMEGA328 microcontroller module that mounts behind standard 16 character x 2 column LCD displays. It is essentially an Arduino Uno with a built in LCD and RS-232 ...

The LiquidCrystal library works with all LCD displays that are compatible with the Hitachi HD44780 driver. There are many of them out there, and you can usually tell them by the 16-pin interface.