Plain English Meaning
The FAA office that handles the paperwork for registering an aircraft to its owner. When you buy a plane, sell one, or change its registration, this is the office that records it and issues the registration certificate.
Full Definition
The office within the Federal Aviation Administration responsible for receiving, processing, and maintaining the official records of civil aircraft registration in the United States. AFS-750 is the internal FAA organizational code for this branch, which is located in Oklahoma City, Oklahoma, and issues the Certificate of Aircraft Registration (AC Form 8050-3) along with related documents covering ownership, sale, and security interests in aircraft.
Context Anchor
Seen when learning about the Certificate of Aircraft Registration and where aircraft registration applications and ownership documents are sent.
Derivation
AFS stands for within the FAA's organizational structure, and 750 is the numeric code identifying this branch. The code itself doesn't carry meaning beyond identifying the office; pilots usually just call it 'the Registration Branch' or 'Oklahoma City.'