Douglas Engelbart ... an input device with five keys that can be pressed simultaneously in different combinations, the same way you would play chords on a piano. The Engelbart Keyset comes ...

The first computer mouse was invented in the early 1960s by Douglas Engelbart ... of graphical user interfaces and pointing devices. By 1987, the patent on Engelbart's mouse had expired, placing ...

Douglas Engelbart ... an input device with five keys that can be pressed simultaneously in different combinations, the same way you would play chords on a piano. The Engelbart Keyset comes ...