Basic computer science concepts

BASIC CONCEPTS OF COMPUTER

DEFINITION OF COMPUTER

  • electronic device
  • accepts and stores input
  • manipulates it
  • outputs result
  • under the direction of stored programs and instructions

DATA AND INFORMATION

Data is raw facts and figures.

When data is processed to make it meaningful it becomes Information .

Data: India, 200, 4, cricket, wicket

Information: India beats Pakistan in cricket match by 50 runs.

WHAT IS HARDWARE

Hardware refers to physical and tangible (touchable) components of computer.

Example. CPU, Keyboard, Monitor, Mouse, Printer

Software is a set of programs which make the hardware of the computer work. Software is abstract in nature that is it cannot be felt and touched.

set of programs necessary to carry out operations for a specified application.

  1. PACKAGES: they are general application software. Most common categories are:

a) Word

Processing Software: e.g. MS Word, Wordstar, etc.

b) Spreadsheets: e.g. MS Excel, Lotus 123, etc.

c) Database Management Systems (DBMS): e.g. Foxpro, MS Access, Oracle, etc. d) Desktop Publishing Packages (DTP): e.g. CorelDraw, Powerpoint, etc.
  • UTILITIES: are those application programs that assist the computer by perfrorming housekeeping functions like backing up disk or scanning/clearing viruses. Some of the utilities are: Text editor, backup utility, Compression utility, Antivirus software.
  • CUSTOMISED SOFTWARE: tailor made software according to users needs.
    SYSTEM SOFTWARE

    System software controls the internal functioning of the computer.

    1. OPERATING SYSTEM: software which acts as an interface between the user and the hardware.

    Note: refer to the post about Generations of computer languages for a better understanding of the text given below.

    2) It is resident in the memory till the entire conversion takes place. Therefore, unnecessary usage of memory.

    http://crackingsolutions083.blogspot.com/2007/12/basic-concepts-of-computer.html basic computer science concepts

    Source: crackingsolutions083.blogspot.com

    Category: Computer Science

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