You can buy a portable computer keyboard from almost any electronics store such as Best Buy, Office depot, Staples, etc. You can also order one from most oneline computer stores.
Portable computer keyboards can be expensive and would only be a good investment if it is something that you use on a regular basis. Many business people would benefit from portable keyboards because it would decrease the time they would need to spend at their computers. But the better option would probably be to buy a laptop.
Best Buy does offer one kind of portable computer keyboards. The keyboard is made by the Matias brand, and is foldable for easy carrying and storage. They make a model compatible with PC's, as well as one that can be used with Macs.
The Microsoft Portable Keyboard is considered to be one of the best.
Casio makes really good portable keyboards. They are also reasonably priced. You can get good deals on Casio keyboards almost anywhere, Amazon in particular.
Because they want a very portable computer.
Staples and Best buy have a variety of keyboards in different price ranges, including wireless keyboards. They are good quality and reasonably priced.
If you want a portable computer and aren't at home a lot.
According to U.S. Industry and Trade Outlook '99, consumers perceived portable keyboards as low quality and home organs as old-fashioned.
Music keyboards come in various sizes, including full-size keyboards with 88 keys, compact keyboards with 61 keys, and smaller portable keyboards with 49 keys or fewer.
A portable computer keyboard provides an excellent additional guide for many users, especially those with new gadgets such as tablets. Since tablets such as those as the IPAD, do not enable typing capabilities that are of those considered the "norm". Portable keyboards enable a more user-friendly capability that tablets would not provide.
Any computer store or electronics store should carry Logitech keyboards. The biggest one that comes to my mind is Best Buy. They carry a number of computers and keyboards that should fit what you're looking for.
there are the QWERTY keyboards and the AZERTY keyboards (hope this is what you meant)