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Edit Comment Close Premium member Presentation Transcript THE COMPUTER SYSTEM-INPUT-OUTPUT DEVICES AND DATA RECORDING MEDIA: THE COMPUTER SYSTEM-INPUT-OUTPUT DEVICES AND DATA RECORDING MEDIA Presented By: Aryaman Aggarwal IX BIndex: Index Introduction Uses Of Computer Components Of A Computer System Input Devices Output Devices Data recording mediaIntroduction: Introduction A computer is an electronic device that processes the input data according to a given set of instructions to give meaningful output or information. It can understand only electric signals ON and OFF . Typing data into the computer through the keyboard - Input. Results produced by the computer - Output. Doing calculations or comparing data is called processing.Uses Of Computer: Uses Of Computer Computers are used in most of our day-to-day activities. They are used in offices, houses, hospitals, etc. They are used to make cartoon films. They are used to create special effects in cinema. They are used for weather forecasting.Continuation: Continuation They are used to produce books, magazines, newspapers, comics, etc. They assist in teaching and learning processes. They are used in medicine and space technology. They are used in railway and airlines reservations.Continuation: Continuation Using computers customer transactions are verified and updated in banks. They are useful in defence services and in hospitals. In libraries, computers are used for issuing books and storing the list of books available in the library. All leading banks have Automated Teller Machine (ATM) services that facilitate speedy transaction.Components Of A Computer: Components Of A Computer Information is entered into a computer with the help of an input device. Keyboard is one of the most important input devices. The Arithmetic and Logic Unit (ALU) is capable of doing arithmetic and logical operations. The Central Processing Unit (CPU) consists of ALU and the control unit (CU).Continuation: Continuation The results are provided by the output device of a computer. The CU controls the activities of a computer. The ALU is like the heart of a computer. The memory unit stores information.Input Devices: Input Devices A cursor is a bright white spot on the screen, which moves as you type. The keyboard layout looks similar to a typewriter. Mouse, light pen, track ball, and joystick are all pointing devices. Joystick is used for moving things around on the screen and for playing games.Continuation: Continuation A scanner copies an image and creates and stores it on a computer in a form that can be used by the computer. The MICR system helps in processing cheques. Objective-type tests where the student has to mark the answers on a special scoring sheet by darkening a square or a circular space by a pencil to indicate the correct choice is directly fed to a computer for grading with the help for grading with the help of an OMR.Continuation: Continuation Graphic Tablet is an input device that is used to create graphics at CAD terminals, engineering workstations, etc. Touch screen is a computer screen designed to recognize the location of a touch on its screen. By touching the screen, the user can make a selection or move a cursor. Voice input and recognition system is an input device that converts human speech into electrical signals.Output Devices: Output Devices Visual display unit and printers are the commonly used output devices. The VDU is similar to a TV screen and can display both text and graphic images. Data can be represented on the screen in two modes-text mode and graphics mode. In the text mode, the VDU screen is usually divided into 80 columns and 25 rows.Continuation: Continuation In the graphics mode, the screen is treated as an array of tiny dots called pixels. There are two types of monitors-monochrome and colour. Some of the popular display adaptors supported by the computer are-EGA, VGA, and SVGA. Printers are divided into two categories-Impact printers and Non-impact printers.Continuation: Continuation The Impact printers are classified as Line printers and Character printers. Drum printer and Chain printers are line printers. The line printers print one line of text at a time. A character printer is a low-speed printer that prints one character of the text at a time.Continuation: Continuation Character printers are divided into two categories-Dot matrix printers and Letter quality printers. Plotters are used to obtain a graphical or pictorial representation of the output. Plotters and printers produce hard copy outputs while the VDU produces soft copy outputs.Data Recording Media: Data Recording Media Memory is used to store the data and instructions to be executed. The main memory can be divided into RAM and ROM. The memory inside the CPU is primary memory and the memory outside it is known as secondary memory. RAM is a read/write memory. Information can be written into and read from RAM.Continuation: Continuation ROM is read-only memory. No information can be written into ROM. Various types of ROM are-PROM, EPROM, and EEPROM. The primary memory is volatile and has limited capacity. Therefore, secondary memory devices are needed. Some of the secondary memory devices are hard disks, floppy disks, CD-ROM, etc.Continuation: Continuation The storage capacity is measured in units such as bytes, kilobytes (KB), megabytes (MB), gigabytes (GB), and terabytes (TB). Bit means a binary digit. It is either 0 or 1. A byte consists of 8 bits. Each byte represents one character. A nibble is combination of 4 bits. Floppy disks are available in 5 1/4 and 3 1/2 diameter size.Continuation: Continuation The standard 3 1/2 diameter floppy is of high density and stores up to 1.44 MB of data. The standard speed of hard-disk rotation is 3600 revolutions per minute. A hard-disk cannot be handled by the user directly as it is placed inside the computer. CD-ROM has more capacity than a hard-disk. The data accessing rate of a CD-ROM is greater than floppy and hard-disks. The standard CD-ROM capacity is 500 to 800 megabytes. You do not have the permission to view this presentation. In order to view it, please contact the author of the presentation.
the computer system aryaman29 Download Post to : URL : Related Presentations : Share Add to Flag Embed Email Send to Blogs and Networks Add to Channel Uploaded from authorPOINT lite Insert YouTube videos in PowerPont slides with aS Desktop Copy embed code: (To copy code, click on the text box) Embed: URL: Thumbnail: WordPress Embed Customize Embed The presentation is successfully added In Your Favorites. Views: 137 Category: Education License: All Rights Reserved Like it (2) Dislike it (0) Added: January 05, 2011 This Presentation is Public Favorites: 0 Presentation Description No description available. Comments Posting comment... By: blaze123 (8 month(s) ago) please allow me to download it Saving..... Post Reply Close Saving..... Edit Comment Close Premium member Presentation Transcript THE COMPUTER SYSTEM-INPUT-OUTPUT DEVICES AND DATA RECORDING MEDIA: THE COMPUTER SYSTEM-INPUT-OUTPUT DEVICES AND DATA RECORDING MEDIA Presented By: Aryaman Aggarwal IX BIndex: Index Introduction Uses Of Computer Components Of A Computer System Input Devices Output Devices Data recording mediaIntroduction: Introduction A computer is an electronic device that processes the input data according to a given set of instructions to give meaningful output or information. It can understand only electric signals ON and OFF . Typing data into the computer through the keyboard - Input. Results produced by the computer - Output. Doing calculations or comparing data is called processing.Uses Of Computer: Uses Of Computer Computers are used in most of our day-to-day activities. They are used in offices, houses, hospitals, etc. They are used to make cartoon films. They are used to create special effects in cinema. They are used for weather forecasting.Continuation: Continuation They are used to produce books, magazines, newspapers, comics, etc. They assist in teaching and learning processes. They are used in medicine and space technology. They are used in railway and airlines reservations.Continuation: Continuation Using computers customer transactions are verified and updated in banks. They are useful in defence services and in hospitals. In libraries, computers are used for issuing books and storing the list of books available in the library. All leading banks have Automated Teller Machine (ATM) services that facilitate speedy transaction.Components Of A Computer: Components Of A Computer Information is entered into a computer with the help of an input device. Keyboard is one of the most important input devices. The Arithmetic and Logic Unit (ALU) is capable of doing arithmetic and logical operations. The Central Processing Unit (CPU) consists of ALU and the control unit (CU).Continuation: Continuation The results are provided by the output device of a computer. The CU controls the activities of a computer. The ALU is like the heart of a computer. The memory unit stores information.Input Devices: Input Devices A cursor is a bright white spot on the screen, which moves as you type. The keyboard layout looks similar to a typewriter. Mouse, light pen, track ball, and joystick are all pointing devices. Joystick is used for moving things around on the screen and for playing games.Continuation: Continuation A scanner copies an image and creates and stores it on a computer in a form that can be used by the computer. The MICR system helps in processing cheques. Objective-type tests where the student has to mark the answers on a special scoring sheet by darkening a square or a circular space by a pencil to indicate the correct choice is directly fed to a computer for grading with the help for grading with the help of an OMR.Continuation: Continuation Graphic Tablet is an input device that is used to create graphics at CAD terminals, engineering workstations, etc. Touch screen is a computer screen designed to recognize the location of a touch on its screen. By touching the screen, the user can make a selection or move a cursor. Voice input and recognition system is an input device that converts human speech into electrical signals.Output Devices: Output Devices Visual display unit and printers are the commonly used output devices. The VDU is similar to a TV screen and can display both text and graphic images. Data can be represented on the screen in two modes-text mode and graphics mode. In the text mode, the VDU screen is usually divided into 80 columns and 25 rows.Continuation: Continuation In the graphics mode, the screen is treated as an array of tiny dots called pixels. There are two types of monitors-monochrome and colour. Some of the popular display adaptors supported by the computer are-EGA, VGA, and SVGA. Printers are divided into two categories-Impact printers and Non-impact printers.Continuation: Continuation The Impact printers are classified as Line printers and Character printers. Drum printer and Chain printers are line printers. The line printers print one line of text at a time. A character printer is a low-speed printer that prints one character of the text at a time.Continuation: Continuation Character printers are divided into two categories-Dot matrix printers and Letter quality printers. Plotters are used to obtain a graphical or pictorial representation of the output. Plotters and printers produce hard copy outputs while the VDU produces soft copy outputs.Data Recording Media: Data Recording Media Memory is used to store the data and instructions to be executed. The main memory can be divided into RAM and ROM. The memory inside the CPU is primary memory and the memory outside it is known as secondary memory. RAM is a read/write memory. Information can be written into and read from RAM.Continuation: Continuation ROM is read-only memory. No information can be written into ROM. Various types of ROM are-PROM, EPROM, and EEPROM. The primary memory is volatile and has limited capacity. Therefore, secondary memory devices are needed. Some of the secondary memory devices are hard disks, floppy disks, CD-ROM, etc.Continuation: Continuation The storage capacity is measured in units such as bytes, kilobytes (KB), megabytes (MB), gigabytes (GB), and terabytes (TB). Bit means a binary digit. It is either 0 or 1. A byte consists of 8 bits. Each byte represents one character. A nibble is combination of 4 bits. Floppy disks are available in 5 1/4 and 3 1/2 diameter size.Continuation: Continuation The standard 3 1/2 diameter floppy is of high density and stores up to 1.44 MB of data. The standard speed of hard-disk rotation is 3600 revolutions per minute. A hard-disk cannot be handled by the user directly as it is placed inside the computer. CD-ROM has more capacity than a hard-disk. The data accessing rate of a CD-ROM is greater than floppy and hard-disks. The standard CD-ROM capacity is 500 to 800 megabytes.