What are the different types of accounts in the FDA Unified Registration and Listing System (FURLS) that are used to access the Device Registration and Listing Module (DRLM)?

There are two kinds of accounts. Each account contains the name, phone, and email and physical address for the contact person. The owner/operator (O/O) account can be thought of as the primary account, as it can make any changes in DRLM. The official correspondent (OC) account is created by the owner/operator, and is responsible for the annual registration and device listing for the establishment(s) they have been assigned to by the O/O.