__NOTOC__ Bug can mean many things:

Zoology

• "True bug" in entomology, the order Hemiptera
• Bug, informally can mean any "creepy-crawly", insect, other arthropod, snail, or slug
• Edible crustacean; the Moreton Bay bug and Balmain bug in Australia, the common lobster in New England
• Pathogen, or the disease caused by one
• Bug (dog breed), crossbreed of Pug and Boston Terrier
• One of many insects referred to by people as a biting insect

Technology

• Software bug, or software defect
• Covert listening device or device for telephone tapping
• Integrated circuit chip, for its buglike appearance
• Manually positioned marker in flight instruments
• A semi-automated telegraph key
• Volkswagen Beetle

TV and Movie

• Bug (2006 film), (2006) psychological thriller, directed by William Friedkin.
• Bug (film), a film directed by Jeannot Szwarc in 1975
• Bug (Starship Troopers), a fictional alien race from the novel and movie Starship Troopers
• TV broadcaster's logo superimposed on the screen; see Digital On-screen Graphic

Music

• Bug (Dinosaur Jr. album), a 1988 album by Dinosaur Jr
• Bug (Dave Davies album), a 2002 album by Dave Davies

Gambling

• Bug (poker), a restricted wild card
• A card cheat's bug is a holdout device

Public media

• BUG Magazine, Croatian magazine
• Bug! and Bug Too! video games

Rivers

• Western Bug, a river in Ukraine, Poland, and Belarus
• Southern Buh, a river in Ukraine

Other

• bug, ISO 639 code for the Buginese language
• B.U.G. - Bicycle User Group

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