This document discusses binary, which is the system of 0s and 1s that computers use to process data. It explains that binary is base 2, meaning there are only two possible values, 0 and 1. It also defines a bit as the smallest unit of information, and explains that 8 bits equals 1 byte. The document contrasts binary with our decimal system, which is base 10, and provides examples of converting decimal numbers to binary and vice versa.