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Computer Basics

Topics Processor RAM Motherboard Hard Disk Cards Ports BIOS Peripherals Cabinet Troubleshooting Processor Processor is the brain of your computer. Some key concepts   Clock : In a computer, clock speed refers to the number of pulses per second that sets the tempo for the processor. Cache A small but fast memory area. Levels of cache exists. Bus (FSB and BSB) : Collection of wires connecting different devices. Pipeline : Implementation technique where multiple instructions are overlapped. 32/64 bit processors   The amount of data a processor can process in a clock cycle. Clock speed and overclocking   BUS SPEED x MULTIPLIER = CPU SPEED (Clock) Which processor is faster?   100MHz x 10.0 = 1000 MHz 133MHz x 7.5 = 997.5 MHz Some commercially available processors Pentium I-IV Celeron Athlon Duron Cyrix C3 Itanium (64 bit) Opteron (64 bit) Choosing the right Processor How do you pick a processor for your system?
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Computer Networks

Computer Network A computer network , often simply referred to as a network, is a collection of hardware components and computers interconnected by communications channels that allow sharing of resources and information. Networks may be classified according to a wide variety of characteristics such as the medium used to transport the data, communications protocol used, scale, topology, and organizational scope. The rules and data formats for exchanging information in a computer network are defined by communications protocols. Well-known communications protocols are Ethernet, a hardware and Link Layer standard that is ubiquitous in local area networks, and the Internet Protocol Suite, which defines a set of protocols for internetworking, i.e. for data communication between multiple networks, as well as host-to-host data transfer, and application-specific data transmission formats. Computer networking is sometimes considered a sub-discipline of electrical engineering, tel
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THE ROLE OF COMPUTER IN ENHANCING BANKING

INTRODUCTION The first computers were people! That is, electronic computers (and the earlier mechanical computers) were given this name because they performed the work that had previously been assigned to people. “Computer” was originally a job title: It was used to describe those humans’ beings (predominantly women) whose job it was to perform the repetitive calculations required to compute such things as navigational tables, tide charts and planetary positions for astronomical almanacs. A long time ago, people charged with the duty of collection and disbursements of tax were encountering problems in calculations. In those days, the problems faced by the early method of data processing involves the use of animal skin, feather, grains e.t.c were very difficult for them to handle. These were later replaced by the use of pens, inks, papers, chalk e.t.c just to supplement human efforts in counting, recording, manipulating, sorting e.t.c of data these
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