How do you alphabetize when using initials?

When alphabetizing using initials, you start by comparing the first letters of each initial. If the first letters are the same, you then move to the second letters, and continue this process through subsequent initials until a difference is found. For example, "A.B. Smith" would come before "A.C. Johnson." It's important to treat each initial as a separate unit, maintaining the order as dictated by the alphabet.