APU

APU or Apu may refer to:

Film and television

The Apu Trilogy, a series of three Indian films, directed by Satyajit Ray, with the fictional character Apu Roy, comprising:
- Pather Panchali (Song of the Little Road) (1955), the first of the three films, covering the early childhood of Apu
- Aparajito (The Unvanquished) (1956), the second film, covering the remaining years of Apu's youth and adolescence
- Apur Sansar (The World of Apu) (1959), the final film of the trilogy, covering Apu's adulthood
Apu Nahasapeemapetilon, a fictional character from the animated television series The Simpsons (appearing 1990–present)

Apu Roy, the fictional character in two novels by Bibhutibhushan Bandyopadhyay:
- Pather Panchali (1929), the basis for the first film of The Apu Trilogy
- Aparajito, a second novel by Bibhutibhushan Bandyopadhyay, the basis of the second and third films of the trilogy
Apu (magazine), a Finnish family magazine (1933–present)

Aliança Povo Unido, or United People Alliance, a political coalition in Portugal
Applied Psychology Unit, now the Cognition and Brain Sciences Unit at the Medical Research Council, United Kingdom
Evangelical Church of the old-Prussian Union, (Evangelische Kirche der altpreußischen Union) a former church
Amherst Political Union, a student debating organization at Amherst College

Alaska Pacific University, in Anchorage, Alaska, United States
American Public University, in Charles Town, West Virginia, United States
Anglia Polytechnic University, former name of Anglia Ruskin University in England
Azusa Pacific University, in Azusa, California, United States
Asia Pacific University of Technology & Innovation, colloquially known as Asia Pacific University, in Kuala Lumpur, Malaysia
Ritsumeikan Asia Pacific University, in Beppu, Ōita, Japan
Azim Premji University, in Bangalore, Karnataka, India

AMD APU, marketing term from AMD for a microprocessor that includes a CPU and a GPU within a single chip
Audio processing unit, a microprocessor for processing audio on computers
Auxiliary power unit, a device on a vehicle that provides energy for functions other than propulsion. They were called "Airborne Auxiliary Power Plant" (AAPP) on certain British Cold War era aircraft.