More than 30 years ago Commodore released a computer-in-a-keyboard called the Commodore 64. It sold for about $600 at the time, making it one of the most affordable and compact personal computers available.
These days you can buy a tiny PC the size of a pack of cards for $35.
But if you still like the idea of a PC-in-a-keyboard there’s a new option: the OneBoard Pro+ is a mechanical keyboard with the guts of an Android tablet.
It’s powered by a Rockchip RK3288 ARM Cortex-A17 quad-core processor with Mali-T764 graphics, 2GB of RAM, and 16GB of storage.
The system has an SD card slot, HDMI output and DVI input, a headphone jack, two USB ports, 802.11b/g/n WiFi, and Bluetooth 4.0.
While the OneBoard Pro+ runs Android 4.4 software and can be used as a standalone system when you plug in a display and mouse, you can also use the system as a keyboard for your PC.
Just run a DVI cable from your PC to the keyboard and an HDMI cable from the keyboard to your monitor. Then you can quickly switch between Android (running on the OneBoard Pro+) and Windows or another operating system (running on your PC).