There are three different versions of the Raspberry Pi 4 out on the market right now: the “normal” Pi 4 Model B, the Compute Module 4, and the just-released Raspberry Pi 400 computer-in-a-keyboard.
The Raspberry Pi is one of the smallest computers anyone can buy. It also happens to be one of the cheapest, with flagship models priced at under $100. This is thanks to how every Pi unit consists of ...