B

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B is the 2nd letter of the English alphabet. It's appearance depends on the writer's calligraphy. It has an uppercase and lowercase version like most other letters.
Origin
The letter B was already part of the Phoenician alphabet more than 3000 years ago in 1000 BC. It is part of many alphabets today.
Usage
 In the game of bingo, B is a column
 In medicine, B is one of the human blood types
 In chemistry, B is the chemical symbol for boron
 In particle physics, b is the symbol for the bottom quark
 In transport, B is the vehicle registration plate of Belgium
 In music, B is a note sometimes referred to as "Si" or "Ti"
 In education, B is a passing grade, usually around 80-70 marks
 In the New York Stock Exchange, B is the symbol for the Barnes Group
 On the internet, B (or /b/) is any of a number of image boards that allow anonymous posts

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