4 Flashcards
(44 cards)
THE WORLD OF COMPUTERS
- Basic Computer
-Major Parts of Computer - Capabilities of Computer
is a device that transforms data into meaningful information.
Computer
Computer can perform the following set of functions:
Accept data
Store data
Process data as desired
Retrieve the stored data as and when required
Print the result in desired format.
: It is the term used for raw facts and figures fed into the computer and along with the set of instructions which enables the computer to convert this raw data into the refined and useful information.
Data
Data represented in useful and meaningful form is information.
Information
Computers can be categorized into :
Digital, Analog and Hybrid
These are the modern computers which are capable of processing information in discrete form.
Digital computers
These computers are used to process data generated by ongoing physical processes.
Analog computer
These use both analog and digital technology. It has the speed of analog computer and the accuracy of a digital computer.
Hybrid Computers
Classification of Digital Computers
Classification of Digital Computers
Micro computer
Mini computer
Main Frames
Super Computers
These are also known as Personal Computers
Micro com.
: These computers can support multiple users working simultaneously on the same machine.
Mini com.
These computers are large and very powerful computers with very high memory capacity.
Main Frames
: These are fastest and very expensive computers
Supercomputers
These devices are used for performing the specific functions and are connected to the computer externally.
Peripheral Devices
Peripheral devices are as follows:
Keyboard
Mouse
Light Pen
Optical/magnetic Scanner
Touch Screen
Microphone for voice as input
Track Ball
Monitor (Visual Display Unit)
Printers
Plotter
Speakers
Types of software
Types of software
System software
Application software
These are those software, without which our PC, laptop won’t run, i.e it is must for a device to be operating.
System software
ese are those software, without which our PC, laptop can run, i.e this software is not necessary for a device to be operating.
Application software
:They will just warn you something about malicious activity going around in your computer. It will not steal your information.
Hacker
They will try to steal your Information without informing you.
Cracker
is an electronic device, operating under the control of instructions stored in its own memory that can accept data (input), process the data according to specified rules, produce information (output), and store the information for future use.
Computer