logo (Noun) A single graphic which contains one or more separate elements.
logo (Noun) An ensign, a badge of office, rank, or power.
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logo A symbol or emblem that acts as a means of identification.
logo A language of Democratic Republic of the Congo.
Wikipedia
A logo is a picture or drawing that is used by a person, group, or company to mark who they are.
A company or group can use a 'logo' on the things that they make, like on the things they sell, on letters, and in advertisements. When another person sees the logo picture, that person knows that the thing they see the logo on came from that company.
Logos can have letters and words in them. Many logos have the name of the company or group in them.
Most logos are very simple drawings with only a small number of colors. Some logos are only black and white.
In many countries, companies and groups should tell their country's government about the logo they are using. If they do this, the government can help stop a different company or group from using the same logo, so that everyone can be sure that the logo is only used by the people who used it first. This is sometimes called a 'trade mark'.
Logos are not used only by companies. Many schools have logos. Some cities have logos. Clubs can have logos. Even people can have their own logos if they want, the heraldic badge is probably the oldest form of logo in the world.
programming language Logo is a programming language that is easy to learn. It is used to teach students and children to program a computer. It was developed to process lists of words. It was like the language LISP.
In 1967, the first Logo ran on a mainframe computer, a machine called a teletype was used to type in and printout the results. There was no screen.
In 1969, it was used to control a Floor Turtle. Commands were added to sent the turtle forward and backwards, and to turn the turtle to left or right. This turtle had pen with different colors. When it moved, it left a trail on the floor.
This was very useful. When a new version of Logo was developed to draw graphics on a screen, it used the same commands. This was called Turtle graphics.
There are 170 versions of Logo. Many of them are open source and free. There are three Logo textbooks that can be downloaded free. Logo is usually an interpreted language.
Hello World.
Load the Logo program. Type the next line in the command box.
Example Showing Graphics and Functional Programming.
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