Ep 1.3 Sub -

: Section 1.3 of the OAuth 2.0 Authorization Framework (RFC 6749) covers Authorization Grants , which includes sub-sections like 1.3.1 (Authorization Code) and 1.3.2 (Implicit).

The term "EP" is frequently used as shorthand for , a brand that specializes in high-performance audio equipment. EP 1.3 SUB

If this is not an audio component, it may be a reference to a specific subsection in a technical or legal document: : Section 1