Abstraction refers to the act of representing essential informations or features without including the background [When,How and to What extent information about them should be shown/transmitted]
Example: Take an example of switch board.You will press certain switches depending on your requirement but what is happening inside or how the process is happening we need not know [or customers dont focus on these issues]
The wrapping up of data is called Encapsulation
Duplication of data is called Data Redundancy
Database is defined as collection of interrelated data [example : Identity Card,Record Keeping Register]
Software is set of electronic instruction tha makes computer to perform task
System Software drives the hardware [physical components or mechanical devices that we can feel and touch] such as mouse,keyboard,memory etc
Application Software is designed for specific purpose such as accounting,browsing Internet,creating essay documents
Web Browser is a software that enables (allows you to access) you to view web pages
Touchscreen [Hardware] can act as input (input device accepts instruction from users like keyboard,mouse] and output device(presents the result i.e monitor).Its a monitor [screen generally used in ATM Machines to withdraw money,add money in your account etc] that displays texts or icons you can touch the screen special sensor detects the touch and depending on the requirement of user [location of touch on the monitor] touchscreen gives output
The transformation of information [input] into useful information is known [output or end result] is called processing
The term booting means starting the computer
Icons are pictures that represent (pictorial representation) programs,files,disk and other resources on your computer
Wireless technology is used in mobile.To call someone enter the mobile number and press the send button which is generally green in colour to send or recieve call.The telephone central office recieves it and sends it to MSC [Mobile Switching Centre] a computerized centre that is responsible for connectiong calls,recieving calls,billing etc
Telephone lines were desgined to transmit human voice not electronic data from computer so Modem were used to convert or process the signals from computer into a form that allows them to travel on phone.Modem is a device that allows one computer [every computer system or laptop has two parts hardware and software in working conditions] to connect an communicate with other computer via telephone lines (Collection of interconnected network is called Internet.Network is connection between two or more systems where a system might be telephone system,computer or satellite) and enable you to communicate and send and recieves e-mail,watch videos etc
Data Warehouse is a repository [storage area] of an organization electronically stored data.
RAM [Random Access Memory] is a device which stores [temporarily] store information [files and program you are working on your computer or laptop].When computer or laptop is turned off,anything left in RAM is lost
ROM [Read only Memory] holds permanent information which contains basic details of computer[how its run,self test program etc that runs everytime when you switch on the computer].You cant change or remove whats stored in ROM
World Wide Web is massive collection of web pages
Webpage is collection of information on different topics in graphical [animated/crtoon type format] way
Uniform Address Locator [URL] also known as address of the webpage.It starts with http;//www.
Search Engine is a program accessed through Internet that allows you to search information you have asked for
From: Computer Science C++ 12th grade/class by Sumita Arora
Introduction to Computers by Peter Norton