Lecture notes
Computer system
- Module
- Computer (COMPUTER)
- Institution
- PEARSON (PEARSON)
Computer system, computer science, computer skills, computer language
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VARDHAMAN COLLEGE OF ENGINEERING(AUTONOMOUS)
Shamshabad – 501 218, Hyderabad
DEPARTMENT OF INFORMATION TECHNOLOGY
C
PROGRAMMING
C PROGRAMMING Page 1
,UNIT I
Computer systems:
A Computer is an electronic device which performs operations such as accepts data
As an input, store the data, manipulate or process the data and produce the results an output.
Main task performed by a computer
• Accept the data
• Process or manipulate the data
• Display or store the result in the form of human understanding
• Store the data, instructions and results.
A computer system consists of hardware and software.
Computer hardware is the collection of physical elements that comprise a computer system.
Computer software is a collection of computer programs and related data that provides the
instructions for a computer what to do and how to do it. Software refers to one or more computer
programs and data held in the storage of the computer for some purpose
C PROGRAMMING Page 2
, Basically computer software is of three main types
System Software: System software is responsible for managing a variety of
independent hardware components, so that they can work together. Its purpose is
to unburden the application software programmer from the often complex details of
the particular computer being used, including such accessories as communications
devices, printers, device readers, displays and keyboards, and also to partition the
computer's resources such as memory and processor time in a safe and stable
manner.
• Device drivers
• Operating systems
• Servers
• Utilities
• Window systems
Programming Software: Programming Software usually provides tools to assist a
programmer in writing computer programs, and software using different
programming languages in a more convenient way. The tools include:
• Compilers
• Debuggers
• Interpreters
• Linkers
• Text editors
Application Software: Application software is developed to aid in any task that
benefits from computation. It is a broad category, and encompasses Software of
many kinds, including the internet browser being used to display this page. This
category includes:
• Business software
• Computer aided design
• Databases
• Decision making software
• Educational software
• Image editing
Computing Environment:
Computing Environment is a collection of computers / machines, software, and networks that
support the processing and exchange of electronic information meant to support various types of
computing solutions.
Types of Computing Environments:
Personal Computing Environment
C PROGRAMMING Page 3
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