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In computing, a device driver or drivers software is a computer program allowing higher-level computer programs to interact with a 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.

A device driver simplifies programming by acting as an abstraction layer between a hardware device and the applications or operating systems that use it. The higher-level application code can be written independently of whatever specific hardware device it will ultimately control, as it can interface with it in a standard way, regardless of the underlying hardware. Every version of a device, such as a printer, requires its own hardware-specific specialized commands. In contrast, most applications utilize devices (such as sending a file to a printer) by means of high-level device-generic commands such as PRINTLN (print a line). The device-driver accepts these generic high-level commands and breaks them into a series of low-level device-specific commands as required by the device being driven. Furthermore, drivers can provide a level of security as they can run in kernel-mode, thereby protecting the operating system from applications running in user-mode.

I’ve now stripped off the nofollow attribute from links on the comments in my blog. Here’s a chance now to get a free back link from organicseo.in by just commenting to any of my posts. I’m sorry for those who have genuinely commented earlier to my posts, which were lost while I moved my blog from Rediff hosting to Dotster.

Comon’ just add a comment now, and get a quick free backlink

Just came across this post on Email from Spammers, and I couldn’t understand as to why those third-rated link exchange guys keep blasting spam emailers, and am not clear about what they achieve for their clients by doing this. I’ve even had people instant messaging me asking if I’m interested in any link exchanges.

In general, all major search engines can identify exchanged links from natural links, and in these days of Search2.0, I don’t understand why people often exchange links with pages like these…

It is better that they read more about linkbaiting, understand what back links is all about and start working towards building natural links, which can have a significant effect in the site’s search ranking in the long run.