Data processing by a computer

• Big inits. in check processing
• Nucleotide involved in photosynthesis
• Big name in payroll
• Payroll services company
• Payroll service initials
• Payroll service co
• An ester of adenosine that is converted to ATP for energy storage
• Big payroll service co.

Wiktionary Word definitions in Wiktionary
n. (initialism of adenosine diphosphate English)