Computing
- Abandonia Reloaded, a freeware games web community
- Accelerated Reader, educational reading assessment software
- Action Replay, video game device
- Active record pattern
- Activation record, a computer science term for the set of data regarding an active subroutine, stored within the stack
- Air Rivals, a MMORPG/FPS, the new Space Cowboy
- Alternate Reality, a primary racial trait in the 4X strategy computer game Stars!
- Armadillo Run, a physics-based, independently developed computer game
- ar (Unix), a Unix archive format and handling tool
- Aspect ratio (image), The relationship between the width and height of an image.
- Augmented reality, an application of virtual reality in the real world
Read more about this topic: AR