Computers
- Stack (abstract data type), abstract data type and data structure based on the principle of Last In First Out (LIFO)
- Call stack, stack data structure that stores information about the active subroutines of a computer program
- Stacks (software), a folder view on the Dock of Mac OS X
- Stack-based memory allocation
- Protocol stack, a particular software implementation of a computer networking protocol suite
- Solution stack, a group of software systems, increasing in abstraction from bottom to top
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