Hornets are large eusocial wasps, reaching up to 35 millimetres (1.5 inches) in length.
The true hornets make up the genus Vespa, and are distinguished from other vespines by the width of the vertex (part of the head behind the eyes), which is proportionally larger in Vespa; and by the anteriorly rounded gasters (the section of the abdomen behind the wasp waist).
The name "hornet" is used for this and related species primarily because of their habit of making aerial nests (similar to the true hornets) rather than subterranean nests.
F/A-18 Hornets (A and B variants) were first test-flown in 1978, and entered service in 1983, replacing the F-4 Phantom II and the A-7 Corsair II.
The Hornet was among the first aircraft to heavily utilize multi-function displays, which at the switch of a button allow the pilot to perform either fighter or attack roles or both.
The Hornet is also notable for having been designed with maintenance in mind, and as a result has required far less downtime than its counterparts, the F-14 Tomcat and the A-6 Intruder.