Advanced mail second class aacj cbuc cgll

It looks like you've provided a series of abbreviations related to mail and postal services. Here's a breakdown of what each abbreviation might stand for:

As for "Advanced Mail Second Class", it's possible that this refers to a specific type of mail service or classification system used by postal services. In general, "Second Class" mail refers to a type of mail that is sent at a lower rate than First Class mail, but is still considered to be a reliable and timely service. "Advanced Mail" might refer to a specific type of mail that uses advanced technologies or services, such as tracking or signature confirmation.

If you could provide more context or information about where you encountered these abbreviations, I might be able to provide a more specific answer or clarification.