Shell

Shell may refer to:

Architecture and design

• Concrete shell, a thin shell of concrete, usually with no interior columns or exterior buttresses
• Shell (structure), a structural element with very small thickness
• Thin-shell structure, light weight constructions using shell elements

Business

• Royal Dutch Shell, a multinational oil and gas company
  • Shell Oil Company, the U.S.-based subsidiary
  • Shell Canada
  • Shell Nigeria
• Shell corporation, a company which serves as a vehicle for business transactions

Chemistry and physics

• Electron shell or a principal energy level of electrons outside an atom's nucleus
• Nuclear shell model, a principal energy level of nucleons within an atom's nucleus
• On shell and off shell, quantum field theory concepts depending on whether classical equations of motion are obeyed

Computing

• Shell (computing), a type of user interface
  • Command-line interface, sometimes referred to as "command shell"
  • List of command-line interpreters, programs occasionally referred to as "shells"
• Operating system shell
• Read–eval–print loop, also known as a language shell.
• Shell account, a user account on a remote server
• Secure Shell protocol
• Shell sort, a sorting algorithm
• An empty expert system

Entertainment

• Shell (film)
• Shell (theater), a curved surface for reflecting sound
• The Shells, a musical group
• "Shells" (Angel), a TV episode
• A receptical used in the Shell game

Nature

• Seashell, a hard outer layer of a marine animal, found on beaches
• Exoskeleton, an external covering of some animals
  • Mollusc shell
    • Bivalve shell
    • Gastropod shell
  • Brachiopod#Shells and their mechanisms
  • Turtle shell
• Eggshell
• Nutshell

Places

• Shell, Ecuador
• Shell, California, United States
• Shell, Wyoming, United States

Watercraft

• Racing shell, a watercraft

Weaponry

• Shell (projectile), an explosive device fired from artillery
• Shotgun shell, a type of shotgun ammunition

Other uses

• Shell (machinery), each half of a two-piece plain bearing
• Coverage shell, the number of defenders guarding the deep portion of the field in American football
• Shell, a woman's blouse or T-shirt

Persons with the surname Shell

• Art Shell (born 1946), American football player and coach
• Donnie Shell (born 1952), American football player
• Donald Shell (born 1924), American computer scientist
• George W. Shell (1831 – 1899), U.S. Representative from South Carolina
• Karl Shell (born 1938), American economist

See also

• All pages beginning with "Shell"
• All pages with titles containing Shell