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An early Xerox optical mouse chip, before the development of the inverted packaging design of Williams and Cherry. The first two optical mice, first demonstrated by two independent inventors in December 1980, had different basic designs: [1] [2] [3] One of these, invented by Steve Kirsch of MIT and Mouse Systems Corporation, [4] [5] used an infrared LED and a four-quadrant infrared sensor to ...
A light pen is a computer input device in the form of a light-sensitive wand used in conjunction with a computer's cathode-ray tube (CRT) display. It allows the user to point to displayed objects or draw on the screen in a similar way to a touchscreen but with greater positional accuracy.
A Wacom Bamboo Capture graphics tablet with supplied inductive pen. The crop marks on the surface indicate the active area, which measures 14.7×9.2 cm or 5.8×3.6 in. An active pen (also referred to as active stylus ) is an input device that includes electronic components and allows users to write directly onto the display of a computing ...
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HP-41 extension (or expansion) modules allowed the user of an HP-41 programmable calculator to extend the functionality of the machine. The HP-41 had room for up to four expansion modules at the back of calculator. The HP-41 was not the only calculator of its generation that allowed expansion modules. The TI-58 and TI-59 also had pluggable ROM ...
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E-cyclable items include, but are not limited to: televisions, computers, microwave ovens, vacuum cleaners, telephones and cellular phones, stereos, and VCRs and DVDs just about anything that has a cord, light or takes some kind of battery. [76] Some companies, such as Dell and Apple, will recycle computers of their make or any other make.
It is not possible to replace a LightScribe label with a new design (as in erase the surface of the disc), but it is possible to add more content to a label that has already been burned. The center of every LightScribe disc has a unique code that, together with a sensor in the drive, allows the drive to know the precise rotational position of ...