device driver

interface for a peripheral device, program which allows an operating system to communicate with a hardware device

A device driver, or software driver is a computer program allowing higher-level computer programs to interact with a computer hardware device.A driver typically communicates with the device through the computer bus or communications subsystem to which the hardware is connected. When a calling program invokes a routine in the driver, the driver issues commands to the device. Once the device sends data back to the driver, the driver may invoke routines in the original calling program. Drivers are hardware-dependent and operating-system-specific. They usually provide the interrupt handling required for any necessary asynchronous time-dependent hardware interface.
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Noun
1. (computer science) a program that determines how a computer will communicate with a peripheral device
(synonym) driver
(hypernym) utility program, utility, service program
(classification) computer science, computing

<operating system> Software to control a hardware component or peripheral device of a computer such as a magnetic disk, magnetic tape or printer.
A device driver is responsible for accessing the hardware registers of the device and often includes an interrupt handler to service interrupts generated by the device.
Device drivers often form part of the lowest level of the operating system kernel, with which they are linked when the kernel is built. Some more recent systems have loadable device drivers which can be installed from files after the operating system is running.
(1994-10-27)

device driver
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