1, The full form of B is Byte. It’s used on Academic & Science ,Units in Worldwide

Byte (B) is a unit for measuring computer information. A Byte is eight binary digits or bits.

2, The full form of B is Magnetic field. It’s used on Academic & Science ,Units in Worldwide

Magnetic field (B) is a region around a magnetic material or a moving electric charge within which the force of magnetism acts.The SI unit of magnetic field is the Tesla (T).

3, The full form of B is Boron. It’s used on Academic & Science ,Chemistry in Worldwide

Boron (symbol: B) is a chemical element with atomic number 5.

4, The full form of B is Billion. It’s used on Academic & Science ,Mathematics in Worldwide

B means Billion.

In American English, a billion means thousand million.

1,000 x 1,000,000 = 1,000,000,000 or 10 ⁹.

In British English, a billion means a million million.

1,000,000 x 1,000,000 = 1000,000,000,000 or 10 ¹².

Now a days, a billion means a thousand million (1,000,000,000 or 10⁹) in both varieties of English.

5, The full form of B is Susceptance. It’s used on Academic & Science ,Electrical in Worldwide

Susceptance (B) is the imaginary part of admittance. Admittance (Y) is a complex quantity: real part is called Conductance (G) and the imaginary part is called Susceptance (B).

Y=G+jB

where

Y is the admittance, measured in siemens

G is the conductance, measured in siemens.

j is the imaginary unit, and

B is the susceptance, measured in siemens.