ADP

ADP is an abbreviation that can mean:

• Access database project, a file format of the Microsoft Access database program
• Adenosine diphosphate, a nucleotide
• Aéroports de Paris (see Air travel in France), airport authority for the Parisian region
• ALAD deficiency porphyria (see List of genetic disorders), a genetic disorder
• AOLserver Dynamic Pages, web server extensions designed to return dynamically created documents based on the TCL computer programming language using AOLserver
• Automatic Data Processing, Inc., a payroll and tax filing processing company