Microsoft B2M-00012 Natural Ergonomic Keyboard 4000 - Comfortable Split-Key Design for Office Work, Typing & Long Hours Computer Use

I dropped a motorcycle back in 1998 and hurt my wrist when I picked it up. Then I went to work (computer programmer) and noticed my wrist hurt after only typing a couple of lines. Coincidentally I had bought but not yet installed one of these. The next day I installed and noticed my wrist no longer hurt. I figured it healed already, but I did a test. I disconnected and reconnected the standard Keyboard. The result? After typing a couple of lines, my wrist started hurting again.I re-installed the natural keyboard and no pain. I've been using these at home and at my computer workstation at work ever since. I'm now 66 years old and have no wrist discomfort after using computers daily since 1983.This thing is a required tool for all my computers - even when using a laptop.