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PEN
- For other uses, see Pen (disambiguation).
A ballpoint pen
A pen is a writing instrument which applies ink to a surface, paper. Pens range in colors, but are mainly found with black and blue ink. Pens may be categorized by the kind of tip on them. The main modern types are:
Ballpoints, fountain pens and gel pens are sometimes erasable: their ink may be erased.
[edit] The ballpoint pen
There are two basic types of the ballpoint pen: disposable and refillable.
A power load that was very similar or the same as the ballpoint pen was developed by the Hungarian journalist Laszlo Biro. Biro developed a new tip consisting of a ball that was free to turn in a socket. The word used for ballpoint pens in Argentina is birome because Laszlo Biro lived there for many years; also, biro can be used to refer to a ballpoint pen in British English. It was originally invented for the British RAF, as problems occurred with fountain pens due to the low air pressure aboard planes in flight.
[edit] See also
[edit] External links
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