1) Unit of information 
The yottabit is a multiple of the unit bit for digital information or computer storage. The prefix yotta (symbol Y) is defined in the International System of Units (SI) as a multiplier of 1024 (1 septillion, short scale), and therefore The yottabit has the unit symbol Ybit or Yb. The yottabit is closely related to the yobibit, a unit multiple deri...