One peripheral that we strongly recommend to you is the Microsoft Natural Ergonomic 4000 keyboard. We had used the Microsoft Natural Keyboard Elite keyboards, for approximately 16 years, on our PCs with PS/2 ports. . After she began using a Microsoft Natural Keyboard Elite keyboard, approximately sixteen (16) years ago, it completely eliminated the problems Pilar had with Carpal Tunnel Syndrome. Pilar had been to doctors and the possibility of surgery, which may have eliminated or exacerbated her problems, was discussed. Our sincere thank you, to the Microsoft Engineers who designed these wonderful Ergonomic keyboards!
The Microsoft Natural Keyboard Elite keyboards are PS/2 devices. At least one of ours came with a PS/2 to USB adapter cable in the carton, but when I tried to use it on my Dell Latitude E6400 (Windows 7 Professional) laptop, on a USB port, the keyboard was not recognized. The Microsoft Natural Ergonomic 4000 is a USB device. I read a review (on CNET?) that said they had tried to use it with a PS/2 to USB adapter on a PS/2 port, but they were not able to get that to work. Update on 23 May 2015: We have four (4) of the Microsoft Natural Keyboard Elite keyboards. Today I got them out of the box they were stored in. One appeared to be brand new, in a Retail box. WIthin the box was a PS/2 to USB adapter cable. I was able to get that keyboard working with my Dell Latitude E6400 laptop (Windows 7 Professional) and Melissa is now using it with her Dell Inspiron 660s micro tower, which is a Windows 7 Home box. I tried the other 3 keyboards, with the other adapter cable we have, but none of them was recognized. Probably those keyboards are an earlier version, or, the adapter cable is an earlier version.
I bought and have been using a Microsoft Natural Ergonomic 4000 for the past week and am very happy to be using it, and not the flat and thin keyboard I was using for the past 4 months. There were no instructions included in the carton for the Microsoft Natural Ergonomic 4000 keyboard, so I will look for information on the Microsoft web site and other places on the Internet, to learn how to use the capabilities it has. This photo is an Affiliate advertising link for this keyboard.