You can use two Windows machines at once with a single keyboard and mouse without any special hardware. I had an extra laptop lying around that now connects with the same keyboard and mouse as my PC.

After decades of working with computers, I started to develop some wrist and arm pain a few year ago. So I switched from using whatever random mouse I could find for under $20 to using input devices ...

You can use your phone as a keyboard on a Windows PC by using the following apps and software. All these programs are free to use. However, some features are limited ...

You can share a keyboard and mouse across multiple Windows and macOS computers, if you know the right tools to use.