Computer
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Computer: - Computer is a
programmable computing machine.
It understands instruction or information entered by users in the form of
binary digit like 1 and 0. All the code of written
program is converted in binary digit for manipulating on the machine. Binary
digit is called a Bit and A set of 8 bits is called a byte. The computer is a
useful system for all. It is used in all
fields like bank, railway, technology, offices, development, prediction of
weather. The computer can store and retrieve data. It completes the large work
in a moment and users can connect to each
other in the entire world through the computer.
1.
System software: - System software is
also called operating software. It is a bridge between the user and the hardware. It works
as a user interface. It controls the
overall operation of the system. It also provides a platform to application
software. Whereby application software easily runs on the system. User
can’t operate the computer without system
software.
There are two
types of operating system
a.
Single user
b.
Multi user
a. Single user operating system: - Single user operating
systems are DOS, Windows vista, Windows ultimate 7, Windows 8 pro, Windows 95,
Windows XP, etc. these operating
systems ready the computer to operate for single
user. It controls the overall Operation of the computer. Such as, print,
copy, save, send, retrieve etc.
b. Multi user operating system: - Multi user operating
systems are UNIX, Linux, Windows-NT, Windows server-2003 etc. these operating systems ready the
computer to operate for multi user. These
are used for server operating system. A number of users use the computer and its
resources in multi user operating system.
Application Software: -
it is used for personal or business purpose. Application software is Tally, Web
designing app, Photo shop, Adobe reader, Page maker, Game app, etc. these all
run with the help of Operating system. User can operate a computer without application software.
User: - the people that
operate a computer is called a user. The user
uses the computer, its resources and application software. Through the computer,
the user sends information and data
across the world and vice-versa.
Memory: - it stores the
data of the user and also keeps safe data for a long time. The computer has
three types of memory.
1.
RAM
2.
ROM
3.
Hard Disk
1.
RAM: - RAM stands
for Random Access Memory. It means it store data or current work as long as the power is on. Once the computer is
switched off. Data is lost. It is accessible for users.
2.
ROM: - ROM stands
for Read Only Memory. It is not accessible for users. User can’t use it for storing data. It stores BIOS data permanently. BIOS manufacturer stores data
in ROM at the time of manufacturing of it. It is important for the computer.
3.
Hard Disk: - It is
storage device and it store data permanently. The
Computer has a hard disk. User stores data and current work in hard disk by
using save option or save button. It saves data for a long time. Once data are
saved in it and the user can retrieve data saved again.
Hardware: - Parts of the
computer is called hardware. Such as a monitor, mouse, keyboard, hard disk, etc.
these all are the hardware of the computer.
Regular maintenance is needed for it. Every part completes own work. Such as, a
printer: it prints data. Keyboard: it inputs data. And monitor: it displays the
data.
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