High Quality Content by WIKIPEDIA articles! HAL is a software project providing a hardware abstraction layer for Unix-like computer systems. It aims to allow desktop applications to discover and use the hardware of the host system through a simple, portable and abstract API, regardless of the type of the underlying hardware. HAL was originally envisioned by Havoc Pennington and is now a freedesktop.org project, being a key part of the software stack of the GNOME and KDE desktop environments. It is free software, dual-licensed under both the GNU General Public License and the Academic Free License. HAL is now deprecated, with functionality being merged into udev as of 2008– 2010; see deprecated, below. Previously, HAL was built on top of udev, which was lower level. HAL is unrelated to the earlier concept of Windows NT kernel HALs (also found in current Windows releases), which handle some platform-specific core functionality within the kernel, such as interrupt routing.

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