Digital electronics must use a numbering system that has more than ten digits.

Zeros may be added to the left of the MSB to produce even groups of 4 bits when converting from binary to hexadecimal.

3C1D₁₆ = 11110000011101₂

When converting from decimal to binary by the repeated division-by-two method, the initial remainder becomes the MSD.

ASCII stands for American Standard Code for Information Interchange.