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Tuesday 27 September 2011

COMPUTER HARDWARE AND SOFTWARE


Hardware
Software
Types:
Motherboard, CPU, RAM, BIOS, power supply, video display controller, computer bus, CD-ROM drive, floppy disk, zip drive.
System software, Programming software, and Application software.
Examples:
CD-ROM, monitor, printer, video card, scanners , label makers, routers , and modems.
Quick books, Adobe Acrobat,, Internet Explorer , Microsoft Word , Microsoft Excel
Inter dependency:
Hardware starts functioning once software is loaded.
To deliver its set of instructions, Software is installed on hardware.
Definition:
Devices required to store and execute (or run) the software.
Collection of instructions that enables a user to interact with the computer. Software is a program that enables a computer to perform a specific task, as opposed to the physical components of the system (hardware).
Function:
Hardware serve as the delivery system for software solutions. The hardware of a computer is infrequently changed, in comparison with software and data, which are “soft” in the sense that they are readily created, modified, or erased on the computer
To perform the specific task you need to complete. Software is generally not needed to for the hardware to perform its basic level tasks such as turning on and responding to input.
Fault:
Hardware faults is physical.
Software faults are not.
Lifetime:
Hardware wears out over time.
Software does not wear out over time.
Failure:
Hardware failure is random. Hardware does have increasing failure at the last stage.
Software failure is systematic. Software does not have an increasing failure rate.
Reliability:
Hardware stays at steady reliability level in useful life.
Software needs constant testing after upgrades.

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