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A disk cipher device of the Jefferson type from the 2nd quarter of the 19th century in the National Cryptologic Museum. The Jefferson disk, also called the Bazeries cylinder or wheel cypher, [1] was a cipher system commonly attributed to Thomas Jefferson that uses a set of wheels or disks, each with letters of the alphabet arranged around their edge in an order, which is different for each ...
Fe del Mundo (1911–2011), Philippines – medical incubator made out of bamboo for use in rural communities without electrical power; Colin Murdoch (1929–2008), New Zealand – Tranquillizer gun, disposable hypodermic syringe; William Murdoch (1754–1839), Scotland – Gas lighting
The Apple Daisy Wheel Printer is a daisy wheel printer manufactured by Qume and sold by Apple Computer, Inc. in the 1980s. It utilized the ASCII character set and used continuous form paper, or with an optional feeder, cut sheet paper.
The Alberti Cipher disk. The Alberti Cipher, created in 1467 by Italian architect Leon Battista Alberti, was one of the first polyalphabetic ciphers. [1] In the opening pages of his treatise De componendis cifris [] he explained how his conversation with the papal secretary Leonardo Dati about a recently developed movable type printing press led to the development of his cipher wheel.
A letter-quality printer was a form of computer impact printer that was able to print with the quality typically expected from a business typewriter such as an IBM Selectric. A letter-quality printer operates in much the same fashion as a typewriter. A metal or plastic printwheel embossed with letters, numbers, or symbols strikes an inked ...
Enjoy a word-linking puzzle game where you clear space for flowers to grow by spelling words.
Using 26 wheels, each with the letters of the alphabet arranged randomly around them, Thomas Jefferson invented the wheel cypher in 1795. Falling in and out of use and obscurity, the wheel cypher was "re-invented" twice: first by a French government official around 1890, and then just prior to World War I by an officer in the United States Army.
Cipher disks had many small variations on the basic design. Instead of letters it would occasionally use combinations of numbers on the outer disk with each combination corresponding to a letter. To make the encryption especially hard to crack, the advanced cipher disk would only use combinations of two numbers.