Payroll service giant, initially

• Payroll service co
• Data processing by a computer
• Big inits. in check processing
• Nucleotide involved in photosynthesis
• Check-processing company, initially
• Big check-printing co.
• Big name in payroll
• An ester of adenosine that is converted to ATP for energy storage

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

Wikipedia Word definitions in Wikipedia
Adp or ADP may refer to: