S.H.I.E.L.D is a law enforcement agency within the Marvel Comics Universe. The original meaning of S.H.I.E.L.D was Supreme Headquarters International Espionage Law-Enforcement Division, but the acronym has changed over the years.
In 1991, Marvel Comics updated the S.H.I.E.L.D acronym to mean Strategic Hazard Intervention Espionage Logistics Directorate. However, in films as well as live-action television series, S.H.I.E.L.D. represents Strategic Homeland Intervention Enforcement and Logistics Division. The S.H.I.E.L.D agency made its first appearance in the 1965 comic, "Strange Tales #135." It often deals with paranormal and superhuman threats. Created by Stan Lee and Jack Kirby, the first official Agent of S.H.I.E.L.D was Nick Fury.