HAL stands for Windows' Hardware Abstraction Layer. The HAL implements a number of functions that are implemented in different ways by different hardware platforms, which in this context, refers mostly to the Chipset. Other components in the operating system can then call these functions in the same way on all platforms, without regard for the actual implementation. For example, responding to an interrupt is quite different on a machine with an Advanced Programmable Interrupt Controller (APIC) than on one without. The HAL abstracts such differences so that nothing outside the HAL need be concerned with them.
Hardware Abstract Layer.
HAL .
HAL 9000 was the artificial intelligence on the space ship and responsible for killing the crew after going a bit schizophrenic. Famous for his quote "I'm sorry Dave I can't do that!". In the film the name was never explained but it has become to be an acronym of "Heuristically programmed ALgorithmic Computer ", tho' some people think it is a jibe at IBM, since if you use the next letter over in the alphabet from IBM you get HAL.
Hal Lamar went by Hal.
Hal Newhouser went by Prince Hal.
Hal Chase went by Prince Hal.
Hal Price went by "Happy" Hal Price.
Hal Baylor's birth name is Hal Brittan.
Hal Lindes's birth name is Lindes, Hal Andrew.
Hal Rothman's birth name is Hal Karl Rothman.
Hal Kemp's birth name is James Hal Kemp.
Hal Frederick's birth name is Hal Christopher Frederick.