In 2005, Manhattan Products released an impractical one of these devices that could be rolled up.  
The space-cadet is an example of an extremely reliable one of these devices made by Honeywell that makes use of the Hall Effect.  The processors within these devices often have logic to handle debouncing.  One of these devices with fully customized displays was released under the brand name Optimus Maximus.  In 2005, Manhattan Products released an impractical one of these devices that could be rolled up.  (*) Quieter models of these devices tend to use membrane switches.  Minecraft creator Notch uses a 30-year-old one of these things which The Verge called the "greatest ever made".  That article celebrated a mechanical one of these things known for being clicky called the IBM Model M and which plugged into a PS/2 port.  Some of these things are arranged in a pattern designed by Dr. August Dvorak.  For 10 points, name these computer accessories, one of which was used to type this question.
The space-cadet is an example of an extremely reliable one of these devices made by Honeywell that makes use of the Hall Effect.  
computer keyboards [or Hall-Effect keyboards] Â 