This is one of the most popular display device used. This is a 16x2 (16 Characters on 2 lines) LCD with Black font and Yellow Backlight.
There are many readily available libraries for interfacing it with Arduino, Raspberry Pi or other Development Boards and Micro-Controllers/Processors.Thi..
Basic 20x4 Character LCD - White on Black 5V
20 characters wide, 4 rows
White text on blue background
Connection port is 0.1" pitch, single row for easy breadboarding and wiring
Single LED backlight with a resistor included, you can power it directly from 5V