Tube may refer to:
Electronics
vacuum tube, a component of electronics
cathode ray tube, a common component of electronics such as televisions and other displays Tube, An expansion bus on the BBC Micro computer
Food
Yoplait Tubes, the Canadian name for Go-Gurt portable yog(o)urt
Geometry
A hollow cylinder.
Mechanics
pneumatic tube, transportation using compressed air
inner tube, a part of a tire
Media
The Tube (TV series), a music related TV series by Channel 4 in the United Kingdom TUBE, a Japanese pop group Tube (game), a freeware game from Bullfrog Productions, released in 1995 Tube (movie), a South Korean movie Tube & Berger, the alias of Dance/Electronica producers Arndt Rörig and Marco Vidovic from Germany YouTube, a website that allows users to upload, view, and share video clips PornoTube, a website with adult material Peter 'Tubes' Dale, aka Tubes from the Soccer AM television show Series of tubes, an Internet meme and analogy for the Internet used by United States Senator Ted Stevens in reference to net neutrality
Music
The Tubes, a San Francisco-based New Wave band, popular in the 1970s and 1980s
Nature
lava tube, found in volcanoes
the inside of a hollow wave in surfing
the flower tube (corolla tube) pollen tube
Packaging
Tube (packaging), a packaging solution for pasty and viscous goods such as toothpaste
Photography
extension tube, a tool for macro photography
Plumbing
tubing (material), used in plumbing, irrigation, and other applications
Software
Tubes (software), a software program that combines file sharing and web publishing technologies
Structural Engineering
Tube (structure), a structural system involved in architectural engineering to help with building stability and wind resistance.
Theatre
Blue Man Group's theatrical show, "TUBES", now called "Rewired."
Transportation
The London Underground, London's subterranean train system, commonly known as the tube. Transbay Tube, an underwater rail tube across the San Francisco Bay