The Management Information Base is a database containing Object Identifier (OID) information. Depicted as a hierarchical structure, the MIB is the "tree" and each individual object is a "leaf," identified by an OID. Levels within the MIB are assigned by different organizations. The top-level MIB OIDs belong to various standards organizations, while lower-level OIDs belong to various organizations (such as network equipment manufacturers, who assign OIDs that extend the MIB with proprietary values).
The F5 OID hierarchy defines all OIDs that reside below the string beginning with 188.8.131.52.4.1.3375.