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2. Position sensitive device - Wikipedia

   en.wikipedia.org/wiki/Position_sensitive_device

   A position sensitive device and/or position sensitive detector (PSD) is an optical position sensor (OPS) that can measure a position of a light spot in one or two-dimensions on a sensor surface. Principles

3. Light pen - Wikipedia

   en.wikipedia.org/wiki/Light_pen

   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.

4. Digital pen - Wikipedia

   en.wikipedia.org/wiki/Digital_pen

   Position-based digital pens use a facility to detect the location of the tip during writing. Some models can be found on graphics tablets made popular by Wacom, and on tablet computers using Wacom's Penabled technology. Electromagnetic Resonance (EMR) pens contain a circuit that resonates with the tablet's digitizer.

5. Graphics tablet - Wikipedia

   en.wikipedia.org/wiki/Graphics_tablet

   A graphic tablet. A graphics tablet (also known as a digitizer, digital graphic tablet, pen tablet, drawing tablet, external drawing pad or digital art board) is a computer input device that enables a user to hand draw or paint images, animations and graphics, with a special pen-like stylus, similar to the way a person draws pictures with a pencil and paper by hand.

6. Atomic force microscopy - Wikipedia

   en.wikipedia.org/wiki/Atomic_force_microscopy

   The most common method for cantilever-deflection measurements is the beam-deflection method. In this method, laser light from a solid-state diode is reflected off the back of the cantilever and collected by a position-sensitive detector (PSD) consisting of two closely spaced photodiodes, whose output signal is collected by a differential ...

7. AOL Mail

   mail.aol.com

   Get AOL Mail for FREE! Manage your email like never before with travel, photo & document views. Personalize your inbox with themes & tabs. You've Got Mail!

8. Stylus (computing) - Wikipedia

   en.wikipedia.org/wiki/Stylus_(computing)

   The device had rotary dials that rotated in accordance with the selected numbers; with gears, drums, and clever engineering, it was capable of addition, subtraction, multiplication and division (using 9's constant). A stylus was used to turn the dials. Later devices of this type include the Arithmometer, in the 1860s; and the Addiator, in 1920. [5]

9. Plot device - Wikipedia

   en.wikipedia.org/wiki/Plot_device

   Many stories, especially in the fantasy genre, feature an object or objects with some great magical power, such as a crown, sword, or jewel. Often what drives the plot is the hero's need to find the object and use it for good, before the villain can use it for evil, or if the object has been broken by the villains, to retrieve each piece that must be gathered from each antagonist to restore it ...