“I don’t believe Microsoft makes hardware - unless you count their game box.”
They make, and have made for 20 years now, what some people consider the best keyboards and mice available, as well as gamepads, joysticks, and other peripherals. They even made wireless cards and access points for awhile (I own one of their cards for use with one of my Windows laptops). I use a Microsoft USB mouse with my eMac. I use a Microsoft gameport gamepad on my gaming PC. And all of their USB peripherals are Mac compatible out of the box.
http://www.microsoft.com/hardware/
Oh, yes, I didn’t think about mice, keyboards etc.
my apologies...