HAL may refer to:

• HAL 9000 was the fictional computer in 2001: A Space Odyssey
• HAL/S is the computer language used to program the space Shuttle's computers
• HAL is the hardware abstraction layer used in Windows NT and in Linux to encapsulate hardware-dependent details from the rest of the operating system. See also: HDL (hardware description language).
• HAL Laboratory, Inc. is a Japanese video game developer
• HAL is an acronym commonly used to refer to Hawaiian Airlines
• HAL is an acronym used to refer to Hindustan Aeronautics Limited
• HAL is an acronym used to refer to cruise ship operator Holland America Line