For a number , if represent the digits of the code word representing then we have:

The second and third letters represent the last two digits of the year of manufacture.

The first three bands represent the significant digits, the fourth is the multiplier, and the fifth is the tolerance.

The ten flags that represent the digits 0 - 9 were not used.

The choice of the letters A through F to represent the digits above nine was not universal in the early history of computers.

This provides ten possible combinations, enough to represent the digits 0-9.

The message is written with only four basic symbols representing the binary digits one and zero and open and close brackets.

(for example, a 12-letter word represents the digits 1,2)

The significand comprises the next 23 bits and represents the significant digits of the number stored.

In 1730, Richard Grey set forth a complicated system that used both consonants and vowels to represent the digits.