By sensing which circuit was modified, the keyboard can tell which key was pressed and transmit that information to your computer, translating finger motions into letters, numbers, and symbols.

What does computer keyboard actually mean? Find out inside PCMag's comprehensive tech and computer-related encyclopedia.

It feels a lot like InFocus’s $99 Kangaroo PC, which similarly stuffs an entire Windows computer into a pocket-able form factor, but trading out the Kangaroo’s battery for a floppy keyboard.

With only a circuit board, keyboard and tiny, blurry monitor, the circa 1975 computer looks crude by today’s standards ...