Casio Computer Co., Ltd. is a multinational electronics manufacturing company headquartered in Shibuya, Tokyo, Japan.

Its products include calculators, mobile phones, cameras, musical instruments and watches. It was founded in 1946, and in 1957 released the world's first entirely electric compact calculator.

Its products include calculators, watches, cash registers, illuminators, digital cameras (Exilim series), film cameras, laptop and sub-notebook computers, mobile phones, electronic keyboards, PDAs (E-Data Bank), electronic dictionaries, digital diaries (early PDAs), electronic games, computer printers, clocks, and portable televisions.

Casio also makes products for local markets, including a "Prayer Compass" watch designed to help Muslims pray on time and in the right direction.

Casio Wmp-1

Special Features:

- It's the first wristwatch mp3 player

- And sound-quality wise, its good player too

- Built-in rechargeable battery; decent time-keeping and playback time

- integrated 32 MB MMC

Weak Points:

- Size-wise, it's not really useable as an everyday watch! It's really huge. - Apparently not WinXP-compatible

- Seems like the built-in MMC cannot be upgraded?