ADP may refer to:

Among organizations and companies:

• Aéroports de Paris, airport authority for the Parisian region in France.
• Alpha Delta Phi (ΑΔΦ), a fraternal organization on college campuses.
• Alpha Delta Pi (ΑΔΠ), a sorority organization on college campuses.
• American Democracy Project, a project of the AASCU to promote understanding of civic engagement among college students.
• American Democracy Project, a 527 group in Florida.
• Association for the Development of Pakistan, a Boston-based non-profit organization.
• Automatic Data Processing, a payroll and tax filing processing company.
• Azerbaijan Democratic Party.

In science: Alpha Delta Phi (ΑΔΦ) is a Greek-letter fraternity in the United States and Canada. ... Alpha Delta Pi (ΑΔΠ) was founded May 15, 1851 at Wesleyan College in Macon, Georgia making it the first female fraternal organization. ... For other uses, see American Democracy Project (527 group in Florida). ... AASCU logo The American Association of State Colleges and Universities (AASCU) is an organization of state-supported colleges and universities that offer degree programs leading to bachelors, masters or doctoral degrees. ... For other uses, see American Democracy Project. ... 527 group, a type of tax-exempt organization, named after a section of the United States tax code, created primarily to influence the nomination, election, appointment or defeat of candidates for public office. ... The Association for the Development of Pakistan [1](ADP) is a non-profit organization with a mission to enhance the lives of the poor, neglected and underprivileged of Pakistan by providing support for carefully selected social development projects in a range of sectors including infrastructure, environment, healthcare, education, gender equality... Automatic Data Processing, Inc. ... The Azerbaijan Democratic Party (Azərbaycan Demokrat Partiyası) is a political party in Azerbaijan. ...

• Adenosine diphosphate, a nucleotide.
• ALAD deficiency porphyria, a genetic disorder.

In computing: Adenosine diphosphate, abbreviated ADP, is a nucleotide. ...

• Access database project, a file format of the Microsoft Access database program.
• AOLserver Dynamic Pages, web server extensions designed to return dynamically created documents based on the Tcl computer programming language used by AOLserver.
• Automatic data processing.
• Accidental damage protection, a contractual construct for the repair of equipment damage, not normally covered under a warranty, such as using a device beyond its intended purpose and other "accidental damage" (usually pertains just to hardware).

ADP may also refer to: AOLserver Dynamic Pages (or ADP) are a set of web server extensions for designing dynamically created documents. ... Automatic Data Processing, Inc. ...

• Andorran peseta, a former currency of Andorra that was a 1:1 peg to the Spanish peseta.
• Area Development Project.

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