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2. Active pen - Wikipedia

   en.wikipedia.org/wiki/Active_pen

   The main difference between an active pen and the input device known as a passive stylus or passive pen is that although the latter can also be used to write directly onto the screen, it does not include electronics and thus lacks all of the features that are unique for an active pen: touch sensitivity, input buttons, etc. [7] Active pen ...

3. Stylus (computing) - Wikipedia

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

   Capacitive styluses work by distorting the screen’s electrostatic field. [9] Screens that receive input from a capacitive stylus (as well as human fingers) can't register pressure applied by the pen; tilting of the pen; and can't distinguish between a capacitive stylus, your finger, or a resting palm as input - it will register all of these ...

4. Digital pen - Wikipedia

   en.wikipedia.org/wiki/Digital_pen

   The input device captures the handwriting data, that, once digitized, can be displayed on a screen. Common digital pen protocols are: Microsoft Pen Protocol (MPP) (formerly N-trig) Wacom AES 1.0 and 2.0; Wacom EMR; Universal Stylus Initiative (USI) Apple Pencil Active Projected Capacitive (APC) Bluetooth; Examples of digital pens: Microsoft ...

5. History of tablet computers - Wikipedia

   en.wikipedia.org/wiki/History_of_tablet_computers

   It weighed 9 pounds and was based on MS-DOS with an electroluminescent backlit CGA display and a "resistive type touch screen in which a voltage is applied to the screen edges, and a stylus detects the voltage at the touched location." The handwriting had to be individually trained for each user. Around 1500 units were sold. [14] [15]

6. Pen computing - Wikipedia

   en.wikipedia.org/wiki/Pen_computing

   Pen computing refers to any computer user-interface using a pen or stylus and tablet, over input devices such as a keyboard or a mouse.. Historically, pen computing (defined as a computer system employing a user-interface using a pointing device plus handwriting recognition as the primary means for interactive user input) predates the use of a mouse and graphical display by at least two ...

7. Stylus - Wikipedia

   en.wikipedia.org/wiki/Stylus

   Many new phones have a built-in stylus which tucks in behind the back cover. Some styluses may extend and contract into small, pen-like cylinders, which are easy to put away. Styluses come in both passive and active versions. A passive or capacitive stylus is a stylus that acts just like a finger when touching a device screen.