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2. Transparency (projection) - Wikipedia

   en.wikipedia.org/wiki/Transparency_(projection)

   Overhead projector in operation, with a transparency being flashed. A transparency, also known variously as a viewfoil or foil (from the French word "feuille" or sheet), or viewgraph, is a thin sheet of transparent flexible material, typically polyester (historically cellulose acetate), onto which figures can be drawn.

3. Overhead projector - Wikipedia

   en.wikipedia.org/wiki/Overhead_projector

   The use of transparent sheets for overhead projection, called viewfoils or viewgraphs, was largely developed in the United States. Overhead projectors were introduced into U.S. military training during World War II as early as 1940 and were quickly being taken up by tertiary educators, [14] and within the decade they were being used in ...

4. Thermofax - Wikipedia

   en.wikipedia.org/wiki/Thermofax

   As copying technology advanced, Thermofax machines were subsequently marketed as a method of producing transparencies (viewgraphs) for overhead projector presentations. A sheet of heat-sensitive clear stock was placed on top of the original, and passed through a ThermoFax, producing a black image on the clear stock.

5. Projection panel - Wikipedia

   en.wikipedia.org/wiki/Projection_panel

   It works with an overhead projector. The panel consists of a translucent LCD, and a fan to keep it cool. The projection panel sits on the bed of the overhead projector, and acts like a piece of transparency. The panels have a VGA input, and sometimes Composite (RCA) and S-Video input. Later models have remotes, with functions such as 'freeze ...

6. Obesity Rates in the U.S. Drop for the First Time in a Decade ...

   www.aol.com/obesity-rates-u-drop-first-204508332...

   For the first time in a decade, rates of adult obesity in the United States have dropped, a new study has found.. The study followed nearly 17 million people, the majority of whom were in the 26 ...

7. I traveled to 50 of the top countries for tourism and ranked ...

   www.aol.com/traveled-50-top-countries-tourism...

   Canada is a beautiful country and an outdoors lover's paradise, with national parks such as Banff and amazing winter sports in Whistler.. But outside Quebec and a handful of other provinces ...