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Digital Camera Digital camera is an input device that takes picture and store them as digital images. Digital camera store captured image storage in our camera or on some type of memory card. Photo taken with a digital camera are typically transferred to a computer using a wired or wireless connection. Many digital cameras allowed the user to edit the image that the number of digital photos depend on the amount of memory in the camera. The main advantage of digital camera is that making photo is enough and save and fast. It does not require any film processing management phone and other mobile devices has built-in digital cameras digital still cameras are available in a wide variety of sizes and capabilities. A quality of digital camera photos depend on its resolution  and describes the  sharpness of an image. Image resolution for Digital Camera is measured in Megapixel. Megapixel are million of pixel in a graphic, today's cameras are typically between 5 and 20 Megapixel. Type...

  Output   The data that has been processed into Useful information is called output  The output can be in two forms. 1.  Soft Copy 2.  Hard Copy  Soft copy  Soft copy in an electronic form  It is easier to modify It is stored on storage devices  Hard copy  Hard copy in in printed form  It is difficult to modify    It is printed on paper Types of Output Different types of output are as follows: 1.  Text Text include connected used to create words sentence and  paragraph. 2.  Graphics  Graphic output include drawing charts and photograph. 3.  Audio Audio output include music speech or any other found many software applications and website use audio for more effective output. 4.  Video  Video is a set of full motion images played at high speed it may also include audio.  Output Devices The hardware components that are used to receive information from the computer are called output devi...

Printers A printer is an output device that prints the character, symbol and graphic on paper. The printed output is called hard copy. Printing the resolution is commonly measured in dots per inch.  Categories of Printers 1.  Impact Printers 2.  Non Impact Printers  Impact Printers Impact printer work like a typewriter. It prints characters or image by taking a print Hammer or set of paint against an inked ribbon.  Impact printer are the oldest print technology which are still produced. The impact printer are used where low cost printing is required. Three Most common form of impact printer are Dot Matrix printer, Daisy wheel printer and Line printer.  Dot Matrix Printer. A Dot Matrix printer is an impact printer.It produces printed images when pens on a print head strike and inked ribbon. When the Ribbon process again the paper is great that farm tractors and graphics. The print head on the Dot Matrix Printer can contain 9224 pin this number of print depen...

 plotter  plotter is an output device that is used to produce image quality graphics in a variety of colours plotter are used to print maps architectural drawing graph and chat upload work by drawing line on paper using fans held in a mechanical arm.  types of plotter  different types of clothes are as follows: . flatbed plotter . drum plotter 1.  flatbed plotter  flatbed plotter is used to plot a draw images it contains a pen for drawing images the paper is placed on a table like surface software instructs  the Panzer to move down on the paper cup and then move on the paper for creating images Most flutter build not to have one or more bands up different colours and widths. 2.  drum plotter

 what is storage  storage is used to store data information and programs permanently it is also known as Kendriya storage are mass storage.  different storage media used to store data information and programs it is also called novel style because its contents remain safe even if the computer is turned off storage media available in different sizes and capacity that the storage media can be a remove able internal or external storage, storage media, hard disk, solid state drive, USB flash drive, memory card and optical disc etc.  hard disk  hard disk is the primary storage device in a computer to store the programs and data permanently it is also known as a hard disk drive this are hard drive most personal computers have at least one hard disk drive some large scale computer contain hundred of hard disc the capacity of hard disc can be up to 8 TB are more.

 optical disc  optical disk is a form of removable storage it include CDS DVDs and Blu-ray discs. optical  drive use our lives to read and write data on optical disk the leather stand for light amplification through stimulated emission of radiation laser beam right on the surface by creating small PIT in the discs. optical discs store data in a single track that spirit from the centre of the disk to the edge of the disc. most test of and laptop computer have at least one optical drive optical drive read data by focusing laser beam on the surface of the disc or less that detect the presence of a fit the presence of fit indicates 1 an absence of pit indicate viro converts the fits into digital data optical disk storage capacity for from 700mb  several GB.  categories of optical disk CD and DVD

 what is software  a set of instruction given to the computer to solve a problem is called software software is also called program different types of software are used to solve different problems a computer works according to the instructions written in the software a computer cannot perform any task without software.  types of software

 categories of operating system  different categories of operating system or as follows:  . stand alone operating system . server operating system . mobile operating system  stand alone operating system  an operating system that works on a desktop or notebook computer is called stand alone operating system some stand alone operating system can work with a server operating system and are called client operating system a client operating system can work to set up a small network for home are small business.  examples of stand alone operating system

 categories of operating system  1. server operating system 2.  mobile operating system 3.  stand alone operating system  server operating system  an operating system that is designed to support a network is called server operating system it is also called network operating system. are server operating system  usually resides on a server the client computers on a network depend on the server for resources many stand alone operating system work at client and interact with a server operating system.  example of operating system

Data Communication Data communication is a process of transferring data electrically from one place to another. It can be transferred by using different media data is application of graph facts and figures. It may consist of text graphics and sound etc etc. An electromagnetic or light waves are used to transmit data from one place to another is called a signal. Propagation of signal across a communication medium is called signaling. Communication of data from one place to another place in the form of signal you called transmission. Elements of data communication 1.  Sending device A device that sends the message is called sending device. It is also called source a transmitter the sending device can be a computer fax machine are mobile phone. It is a computer is usually used as sending device in communication system. 2.   Receiving device  A dvice that receive the message is called receiving device. It is also called sync the receiving device can be a computer printer...

Communication Devices. The Hardware used to transmit data instruction and information between a sending and receiving device is called communication device. A communication device at sending and send data to a communication channel a communication device at receiving and receive data from communication channel. Sometime the communication device may also convert the data from digital to analogue and analogue to digital signals. Some important communication devices are as follows: Dialup Modem Modem is a communication device that send and receive data from one computer to another on the Internet through telephone line. Britannic and Seema computed both must have died of modern computer store information in the form of digital signal. However, the information transmitted over the telephone line is in the form of analogue signals that dial-up modem receive data from computer in digital form and convert it into analogue form this process is called to  Modulation. It had the analogue sig...

 Communications Channel The path through which data is transmitted from one place to another is called communication channel.It is also known as communication media, transmission media.The amount of data that can be transferred through a communication medium is in a unit  half time is called bandwidth. The bandwidth of digital signal is measured in bytes per second.The bandwidth of analogue signal is measured in cycle/second our Hertz.  Types of transmission media 1.  Physical transmission media 2.  Wireless transmission media Physical transmission media In bounded media  communication devices are directly connected with each other by using some physical media like waves that signals are bound to a specific part of the void or cable it is also called guided media. Some example of bounded media wire pair coaxial cable and fibre optic. Twisted pair Twisted pair is the most commonly used physical communication medium that is used in local area network to conne...