Tangerine Computer Systems produced one of the first 6502-based kit computers. The company was run out of offices in Ely, in the United Kingdom. The Tangerine had a 3U form factor, not much memory, a video character generator and a simple latch for entering hex data from a keypad. The majority of the chips were not socketed which led to all sorts of hardware debugging issues. The manual came with a 1K listing of Conway's Game of Life. An optional expansion board could be built with UART, for keyboard, more memory and BASIC ROMs.