IEEE Spectrum on MSN6 天
Before the Undo Command, There Was the Electric Eraser
An electric eraser could also be a timesaver. In the days before computer-aided drawing and the ease of the delete and undo ...
Hackaday2 年
Power Up Your Pencil With The 30,000 RPM Erase-O-Matic
There are some inventions that look completely pointless to the untrained eye: who would ever need a motorized garbage can, an electric pencil sharpener or a battery-powered eraser? Quite often ...