The abbreviation for Pennsylvania is "PA" because it is derived from the state's full name, which is "Commonwealth of Pennsylvania." The abbreviation "PA" represents the first and last letters of the state's name. The abbreviation "PE" is not used for Pennsylvania because it does not accurately reflect the state's name or its phonetic pronunciation.
Related Q&A：
Why is the abbreviation for Pennsylvania pa vs pe？-Well, you know, the abbreviation for Pennsylvania is \PA\ and not \PE\ for a few reasons. It's kind of like an established convention that's been used for a long time. I think it might have something to do with historical and administrative decisions. Maybe it was just easier to standardize it as \PA\ for simplicity and clarity in various contexts. It's not really a random choice; it's more of a settled and accepted form that everyone's gotten used to over the years. So, that's why it's \PA\ and not \PE\!
