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CodePen is an online community for testing and showcasing user-created HTML, CSS and JavaScript code snippets. It functions as an online code editor and open-source learning environment, where developers can create code snippets, called "pens," and test them. It was founded in 2012 by full-stack developers Alex Vazquez and Tim Sabat and front ...
The pigpen cipher (alternatively referred to as the masonic cipher, Freemason's cipher, Rosicrucian cipher, Napoleon cipher, and tic-tac-toe cipher) [2] [3] is a geometric simple substitution cipher, which exchanges letters for symbols which are fragments of a grid. The example key shows one way the letters can be assigned to the grid.
The space bar is on the bottom center of the keyboard. The space bar, spacebar, blank, or space key, [1] Space bar is a key on a typewriter or alphanumeric keyboard in the form of a horizontal bar in the lowermost row, significantly wider than all other keys. Its main purpose is to conveniently enter a space, e.g., between words during typing.
The Space Pen (also known as the Zero Gravity Pen ), marketed by Fisher Space Pen Company, is a pen that uses pressurized ink cartridges and is able to write in zero gravity, underwater, over wet and greasy paper, at any angle, and in a very wide range of temperatures. Astronaut Walter Cunningham, Apollo 7 lunar module pilot, writes with space ...
Parker 51. The Parker 51 is a fountain pen first introduced in 1941. Parker marketed it as "The World’s Most Wanted Pen", a slogan alluding to restrictions on production of consumer goods for civilian markets in the United States during World War II . Parker's continual advertising during the war created demand that took several years to ...
Retractable pen. A pen being clicked. A retractable pen is a type of ink pen that has a spring-loaded ink cartridge which retracts and extends outside a protective housing. By clicking downward on the top of the pen, the tip is extended and locks in place at the bottom of the housing for use.
Counter pen. A counter pen is a pen designed to be affixed to the counter or table of an institution, such as a bank or a post office, typically by a chain, ball chain or plastic cord, making it less likely that the pen will be accidentally or purposefully removed. A 1938 issue of The Bankers Monthly describes the concept: "The pen also gives a ...
A typewriter is a mechanical or electromechanical machine for typing characters. Typically, a typewriter has an array of keys, and each one causes a different single character to be produced on paper by striking an inked ribbon selectively against the paper with a type element.