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The term "blackboard" is attested in English from the mid-18th century; the Oxford English Dictionary provides a citation from 1739, to write "with Chalk on a black-Board". [15] The first attested use of chalk on blackboard in the United States dates to September 21, 1801, in a lecture course in mathematics given by George Baron. [16]
At a basic level, visual content can be provided by drawing directly onto a blackboard or whiteboard during the presentation. At a more advanced level, flip charts, slide projectors, and overhead projectors can be used for displaying prepared content. The use of prepared material often results in a neater and more accessible presentation.
Children's drawing on a chalkboard. Chalkboard art or chalk art is the use of chalk on a blackboard as a visual art. [1] It is similar to art using pastels and related to sidewalk art that often uses chalk. Chalkboard art is often used in restaurants, shops or walls. [2]
Tux Paint was initially created for the Linux operating system, as there was no suitable drawing program for young children available for Linux at that time. [3] It is written in the C programming language and uses various free and open source helper libraries, including the Simple DirectMedia Layer (SDL), and has since been made available for Microsoft Windows, Apple macOS, Android, Haiku ...
Boogie Board is a product line of paperless note taking tools, utilizing an LCD in conjunction with a stylus, finger, or other implement to replicate the functionality of pen and paper.
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A light pen detects changes in brightness of nearby screen pixels when scanned by cathode-ray tube electron beam and communicates the timing of this event to the computer. Since a CRT scans the entire screen one pixel at a time, the computer can keep track of the expected time of scanning various locations on screen by the beam and infer the ...
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