Binary

From CS2800 wiki

In digital logic, it is convenient to represent numbers using high and low voltages; We can think of a high voltage as "1" and a low voltage as "0"; allowing us two digits to work with. Thus it is convenient to represent numbers in base 2, which is also called binary.

Binary digits are also called bits.

Binary numbers are sometimes written with a leading "b", as in "b1101", which is another way of writing [math](1101)_2 [/math] or [math]13 [/math].