PAD written in all-caps, such as in an acronym, may refer to:

Media and entertainment

• Peter Allen David, American writer
• Poker After Dark, a poker television show which features sit and gos and cash games
• Puzzle & Dragons, a 2012 Japanese mobile game developed by GungHo Online Entertainment

Organizations

• Pakistan Association of the Deaf, a Pakistani organisation representing deaf people
• Pakistan Association Dubai, a Pakistani expatriate organisation
• People's Action for Development, an Indian NGO
• People's Alliance for Democracy, a political group in Thailand
• Phi Alpha Delta, a fraternity
• Propaganda and Agitation Department of the Central Committee of the Workers' Party of Korea

Science and technology

Computing

• Packet Assembler/Disassembler, a communications device
• PAD, a C1 control code used for padding
• Portable Application Description, a document format
• Program-associated data, a type of broadcast information

Medicine and psychology

• PAD emotional state model, a psychological model based on pleasure, arousal and dominance
• Peripheral artery disease, a vascular disease that causes ulcers (wounds) to develop on the legs and feet
• Peroral anti-diabetics, a group of medications to treat diabetes mellitus
• Pre-Operative Autologous Donation, when a patient's own blood is taken for possible use during surgery

Other technologies

• Prithvi Air Defence, a missile

Other uses

• PAD, London Paddington station's station code
• PAD, Paderborn Lippstadt Airport's IATA code
• Pontoon Assembly Detachment of the U.S. Navy Seabees
• Pre-Authorized Debit or direct debit, a financial transaction in which one withdraws funds from another person's account