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The Teletype Model 33 provided a key labelled RUB OUT to punch this character (after the user backed up the tape using another button), and did not provide a key that produced the Backspace character (BS). Therefore, a number of less-expensive computer systems that used Teletypes used this key (and thus the Delete code) to ignore the previous ...
Correction tape is an alternative to correction fluid used to correct mistakes during typing, or, in some forms, handwriting. One side of the tape, which is placed against the area to cover, is coated in a white, opaque masking material. Pressure applied to the other side of the tape transfers this material to the paper.
Wite-Out dates to 1966, when Edwin Johanknecht an insurance-company clerk, sought to address a problem he observed in correction fluid available at the time: a tendency to smudge ink on photostatic copies when it was applied.
The Tipp-Ex name is derived from the German word 'tippen' which means 'to type' and 'Ex' from the Latin for from, out or former. In 1997, the Tipp-Ex brand was sold to Société Bic. Production of correction tape ceased around the year 2000 due to the end of the common usage of the typewriter. Ko-rec-Type was a brand of typewriter correction film.
The brush applies the fluid to the paper. Before the invention of word processors , correction fluid greatly facilitated the production of typewritten documents. One of the first forms of correction fluid was invented in 1956 by American secretary Bette Nesmith Graham , founder of Liquid Paper . [ 1 ]
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Liquid Paper products at The Women's Museum in Dallas, Texas. Liquid Paper is an American brand of the Newell Brands company marketed internationally that sells correction fluid, correction pens, and correction tape. Mainly used to correct typewriting in the past, correction products now mostly cover handwriting mistakes.
Litmus paper after being used. The main use of litmus is to test whether a solution is acidic or basic, as blue litmus paper turns red under acidic conditions, and red litmus paper turns blue under basic or alkaline conditions, with the color change occurring over the pH range 4.5–8.3 at 25 °C (77 °F). Neutral litmus paper is purple. [2]