CSC-103(Fall-2015)

There are a lot of terms used to describe computers. To put it in simple words a computer can be defined as an electronic device that processes instructions and produces an output to the user. To unveil the secret behind this process, understanding of individual components is important. Starting with the case, we'll discuss the role and functionalities of the various peripherals and hardware which are integral parts of the computer. What is a Computer? A machine that can be programmed to : Receive information. Process the information according to a set of suitable instructions. Display desired result information. A computer can also be used to store information whenever required It is a device capable of performing arithmetic and logical operations Computer-The Framework Types of computers Analog-An analog computer represents data as physical quantities and operates on the data by manipulating the quantities Digital-A computer that stores data in terms of digits (numbers) and proceeds in discrete steps from one state to the next Hybrid-Hybrid computers are made by combining features of analog computers and digital computers

In computer architecture, a bus (related to the Latin "omnibus", meaning "for all") is a communication system that transfers data between components inside a computer, or between computers. This expression covers all related hardware components (wire, optical fiber, etc.) and software, including communication protocols. Early computer buses were parallel electrical wires with multiple connections, but the term is now used for any physical arrangement that provides the same logical functionality as a parallel electrical bus. Modern computer buses can use both parallel and bit serial connections, and can be wired in either a multidrop (electrical parallel) or daisy chain topology, or connected by switched hubs, as in case of USB.

nformation Technology is a useful and powerful tools used to provide services for library resources by organizing all the formats of resources in the era of Information and Communication Technology. Traditional tools of library systems are now being transferred by Information Technology. In Bangladesh most of the library professionals are not much familiar with Information Technology especially the hardware used in a computer. In this paper, given description are based on hardware that required for library professionals. Covered hardware information will inspire the library professionals to acquire more knowledge on hardware and help them to take decision during purchasing of computers for library. Pictures and illustration are presented in such way that reader can easily understand the matter. Technical information with photographs will guide the library professionals to enrich their knowledge and influence them to develop their knowledge in Information Technology for the sack of professional development.