Arts entertainment, and media

Register (music), the relative "height" or range of a note, melody, part, instrument, etc.
Register, a 2017 album by Travis Miller
Registration (organ), the art of combining the different sounds of a pipe organ to produce the desired sound

South Australian Register, later The Register, originally the South Australian Gazette and Colonial Register

Federal Register, a public journal of the United States federal government
Napa Valley Register, Napa Valley, California
National Catholic Register, the oldest national Catholic newspaper in the United States
New Haven Register, Connecticut
Orange County Register, Santa Ana, California
Social Register, one of a number of directories of prominent American families
The Des Moines Register, Iowa
The New England Historical and Genealogical Register, Boston, Massachusetts

Register (art), the separation of multiple pictographic scenes from each other
Registration acts (comics), fictional legislation that is a focus in Marvel Comics

Documents, records and government

For maritime uses, see § Maritime.

Accession Register, identifiers assigned to each acquisition in a library or archive
Register, official student records kept by an academic institution's Registrar
Check register, booklet used to record account transactions
Civil registration, government recording of births, marriages, and deaths
Company register, a record of organizations in the jurisdiction they operate under
Family register, a registry used to track information of genealogical or legal interest
Register (General Land Office), head of a district office which sold public lands under the United States' General Land Office system
Register office (United Kingdom), where births, deaths and marriages are officially recorded
Registration statement, a set of U.S. legal documents
Resident registration, government recording of place of residence
Summit register (or canister), record of visitors to a mountain's summit
Vehicle registration, compulsory registration of a vehicle with a government authority
- Aircraft registration, registration of an aircraft with a government authority
- Vehicle registration plate, metal or plastic plate attached to registered vehicle
- Watercraft registration, registration of a watercraft with a government authority (See § Maritime for examples)
Voter registration, entry onto an electoral roll

Register (sociolinguistics), a form of a language used for a particular purpose or in a particular social setting
Register (phonology), a sound system that combines tone with phonation
Vocal register, the range of tones in the human voice

Ship registration, the process by which a ship is documented
Watercraft registration, compulsory registration of a watercraft with a government authority

Indian Register of Shipping, an independent ship classification society, founded in India in 1975
International Register of Shipping, an independent classification society
Korean Register of Shipping, a not-for-profit classification society founded in South Korea
Lloyd's Register, a global engineering, technical and business services organisation and a maritime classification society
Norwegian International Ship Register, a Norwegian ship register for Norwegian vessels
Norwegian Ship Register, a domestic ship register for Norway
Polish Register of Shipping, an independent classification society established in 1936
Russian Maritime Register of Shipping, an international classification society established in 1913

USS Register, several United States Navy ships
Naval Vessel Register, the official inventory of ships and service craft in custody of or titled by the United States Navy

Register (C programming language), a reserved word (keyword) and type modifier
Register (codebook), a codebook, a finite list of defined terms, used i.e. as a primary key in databases
Hardware register, a placeholder for information about some hardware condition
- Status register, a collection of flag bits for a computer processor
Processor register, a component inside a central processing unit for storing information
- Quantum register, the quantum mechanical analogue of a classical processor register
Register signaling, in telecommunications
Register.com, a domain registrar

Camera register or flange focal distance, distance from the mounting flange to the film plane of an interchangeable lens camera
Cash register, a device for recording cash transactions and storing cash
Image registration, process of transforming different sets of data into one coordinate system
Printing registration, in color printing, the correlating of colors in a single image
User registration, the process of becoming a registered user