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designing computer based information systems background the role of management information systems mis in an organization can be considered as
debugging once a program has been written it has to be tested first to ensure that it is free of errors it is very normal that any program written
problem solving using a computerthe following steps are required for solving a problem using a computer system problem definition
source and object programsa set of instructions in a high-level language are called ldquosource programrdquo since high-level languages are machine
programming languagesa number of programming languages are available for program writing these languages can be classified as follows
on-line and realtime systemsan on-line system means that input and output devices are directly connected to the cpu irrespective of geographical
time sharingtime sharing allows a large number of users at various remote terminals to simultaneously use a centrally located computer for problem
multiprogrammingmultiprogramming means capability of several programs to simultaneously occupy a portion of the computerrsquos memory and compete for
batch processingwhen the entire computer system is dedicated to a single job the system is said to be operating in batch processing mode in this mode
operating system os an operating system is the complete set of programs written to utilize the computer resources in an optimal manner the operating
compiler a compiler is a special program which translates programs written in high level language into machine language the original program is
languagesthe language is a program containing rules and guidelines to help us in making programs there are various languages like c basic cobol
application software application software generally is the software which is used to generate customized applications for the clientsex word star
systems software systems software generally is the software which control the computers and other peripheralsex ms dos windows 95 unix netware and
software computer cannot be used without a software in it it is the software which gives instructions to the hardware of the computer so as to work
compact diskette cd cd-rom cd-rom stands for compact disk-read only memory this disk comes with data already stored in it it can store around 640 mb
central processing unitmicroprocessorthe microprocessor is an important component in the cpu it is the unit which processes the instructions
types of printers1 impact printersthe impact printers produce the image through a mechanism of striking on the stationary2 line printerthis type
output devices video display unit vdu or monitorvideo display unit is similar to a television it is used to display the results of processes the
input devices keyboardkeyboard is the device through which the commands instructions required for execution of a program is entered it consists of a
overview of a computer system there are three major elements in every computer solution they are data hardware
another way of classifying a computer system is based upon its size and capabilitiesmicrocomputers microcomputers are systems based on the use of
special-purpose and general-purpose computers in general there are two types of digital computers the first is the special-purpose digital computer
classification of computersdigital analog and hybrid computers are of three basic types ndash digital analog and hybrid current use of the word
the fourth generation 1975 onwards this generation of computers have one or more of the following characteristics semi-conductor memory