Shell
Shell may refer to:

Architecture and design
Shell (structure), a thin structure
Concrete shell, a thin shell of concrete, usually with no interior columns or exterior buttresses
Thin-shell structure

Science
Biology
Seashell, a hard outer layer of a marine animal, found on beaches, when brought near to the ear one can hear the sound of the ocean. It can also be a small shelter for insects
Eggshell
Nutshell
Exoskeleton, an external covering of some animals
Mollusc shell
Bivalve shell
Gastropod shell
Shell, of a brachiopod
Turtle shell

Physics and chemistry
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

Mathematics
Spherical shell

Organisations
Shell plc formerly Royal Dutch Shell plc, a British multinational oil and gas company
Shell Oil Company or Shell USA
Shell Australia
Shell Canada
Shell Nigeria
Shell corporation, a type of company that serves as a vehicle for business transactions

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
Web shell, interface that enables a web server to be remotely accessed
Read–eval–print loop, also known as a language shell
Shell account, a user account on a remote server
Secure Shell, cryptographic network protocol
Shellsort or Shell sort, a sorting algorithm by Donald Shell
Shell, 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
Shell, a receptacle used in the Shell game

Places
Shell, Ecuador
Shell, Wyoming, United States
Shell Lake (disambiguation), several places

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

Persons with the surname Shell
Art Shell (born 1946), American football player and coach
Brandon Shell (born 1992), American football player
Donald Shell (1924–2015), American computer scientist
Donnie Shell (born 1952), American football player
George W. Shell (1831–1899), U.S. Representative from South Carolina
Karl Shell (born 1938), American economist

Other uses
Racing shell, a watercraft
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
Conchiglie, a type of pasta

See also
Shell suit, a descendant of the tracksuit
Shel (disambiguation)
Shels (disambiguation)
All pages with titles beginning with Shell 
All pages with titles containing Shell