Difference between Input Devices and Output Devices
INPUT DEVICE | OUTPUT DEVICE |
Sends data to the processor for executio ... | Sends processed data back to the user. |
Helps computer in receiving data | Helps computer in displaying data |
Complex design structure | Less complex design structure |
Example – Keyboard, Image Scanner, etc. | Ex: Monitor, Printers, etc. |
What are 5 input devices of a computer?
What is an input device and what are the two most commonly used?
- Keyboard. Keyboard is the most common and very popular input device which helps to input data to the computer.
- Mouse. Mouse is the most popular pointing device.
- Joystick. Joystick is also a pointing device, which is used to move the cursor position on a monitor screen.
- Light Pen.
- Track Ball.
- Scanner.
- Digitizer.
- Microphone.
What are the 10 input devices of computer?
- 10 Examples of Input Devices. Keyboard. …
- Keyboard. Keyboards are the most common type of input device. …
- Mouse. …
- Touchpad. …
- Scanner. …
- Digital Camera. …
- Microphone. …
- Joystick.
What are the functions of input and output?
- Instead of reading or writing data directly from the user’s memory, it is copied to or from an OS buffer
- Reasons for buffering – Processes must wait for I/O to complete before proceeding – Certain pages must remain in main memory during I/O Single Buffer
- Operating system assigns a buffer in main memory for an I/O request
What is the difference between input and output?
Output devices are technically the opposite of input devices. • An input device is a hardware device that is used to deliver data to a computer for processing, whereas an output device is a hardware device that is used to receive data from a computer to obtain results for the users. • The user can control the input devices accordingly.
What is input and output device with example?
There are many input devices such as a keyboard, mouse, webcam, microphone and more, which send information to a computer system for processing. An output device, like Monitor, printer and more, displays the result of processing generated by input devices.
What are inputs in a computer?
An input is data that is entered into or received by a computer. This could include a user pressing a key on a keyboard, clicking a mouse to select something on screen or tapping a touch pad. Some inputs indicate to the computer what we want it to do, while others provide data for the computer to process.
What are the 10 input devices?
Computer - Input DevicesKeyboard.Mouse.Joy Stick.Light pen.Track Ball.Scanner.Graphic Tablet.Microphone.More items...
What is output computer?
An output is data that a computer sends. Computers only work with digital information. Any input that a computer receives must be digitised. Often data has to be converted back to an analogue format when it's output, for example the sound from a computer's speakers.
What is input vs output?
An input device is connected to a computer that sends out data into the computer, while an output device is connected to a computer that receives incoming data. The data that is sent by the input device to the computer for processing is reproduced or displayed by the output device.
What are the 5 output devices?
The various output devices are:Monitor. A computer's principal output device is a monitor, often known as a Visual Display Unit (VDU). ... Printer. Printers are information output devices that allow you to print data on paper. ... Plotter. ... Projector. ... Speakers. ... Headphones. ... Sound Card. ... Video Card.More items...•17-Aug-2021
What are 4 examples of output devices?
Examples include monitors, printers, speakers, headphones, projectors, GPS devices, optical mark readers, and braille readers.
What are the examples of output?
Examples of Output DevicesMonitor. The monitor is an example of a visual output device. ... Projector. The projector, as the name suggests, projects the data on a big surface or screen. ... Video Card. Yet another example of visual output devices is a video card. ... GPS. ... Printer. ... Braille Reader. ... Speaker/Headphones. ... Sound Card.
What keys can be seen on a keyboard?
Typing Keys, Numeric Keypad, Function Keys, Control keys, and Special Purpose Keys are available on the keyboard.
What is input to the computer?
Simply one can understand Input is data that a computer takes, on the other hand, the output is data that a computer transfers. Computers only work...
What do OCR and OMR stand for?
OCR stands for Optical Character Reader and OMR stands for Optical Mark Readers.
What kind of device is a speaker?
Speaker is an output device.
What is the importance of an output device?
Computer output devices obtain information from the computer and transmit data that has been processed by the computer to the user. Output devices...
List some of the names of input and output devices?
Input devices: Keyboard, Mouse, JoyStick, Light pen, Track Ball, Scanner, Graphic Tablet, Microphone, Magnetic Ink Card Reader (MICR), Optical Char...
What is OMR scanner?
OMR is a special type of input machine. This sort of optical scanner is used to identify the type of mark made by pen or pencil. It is used where one out of a predefined alternative is to be selected and marked. The format to be fed to the OMR is predefined and can’t be used as an ordinary scanner.
What is a track ball?
Track Ball. The trackball is another type of input device similar to the mouse. It is most helpful with a notebook or laptop computer, instead of a mouse. It consists of a ball on the top which is half inserted and connected to the sensors. By moving fingers on the ball, the cursor can be moved.
What is a microphone?
A microphone or mic is a very common input device used to input sound that is then stored in a digital form. Nowadays microphones are used in almost every industry and devices related to sound recording or transmission.
What is the most basic input device?
The keyboard is the most basic and very commonly used input device which helps to input data to the computer. The layout of the buttons in a normally used keyboard is similar to the traditional typewriter, but there are a few additional keys provided by different manufacturers for performing additional functions.
What is the main function of a computer?
The main functioning of a computer system is based on the combined usage of both input and output devices. Utilizing an input device, a user can give directions to the computer to run and the device reverts to the user’s action through an output device. Let’s understand first what is an input unit and output unit.
What is the most common output device used with a computer to listen to the sound?
Speakers. Computer speakers are the most popular output devices used with a computer to listen to the sound. These speakers receive audio as input either in analog or digital form and generate sound as an output.
What is webcam?
A Webcam is a camera that is combined with a computer. Unlike a digital camera, they cannot function independently and should be connected to the computer/laptop for operation. It functions as an input device that can take pictures, and is mostly used for video streaming and video conferencing or chatting.
What is a joystick?
The joystick is a vertical stick which moves the graphic cursor in a direction the stick is moved. It typically has a button on top that is used to select the option pointed by the cursor. Joystick is used as an input device primarily used with video games, training simulators and controlling robots
What is a scanner?
Scanner is an input device used for direct data entry from the source document into the computer system. It converts the document image into digital form so that it can be fed into the computer. Capturing information like this reduces the possibility of errors typically experienced during large data entry.
What is input/output device?
In simple terms, input devices bring information INTO the computer and output devices bring information OUT of a computer system. These input/output devices are also known as peripherals since they surround the CPU and memory of a computer system.
What is a Bluetooth speaker?
An output device that produces sound after receiving a command from the computer. They support the computers as well as other hardware devices. Now we also have wireless speakers with Bluetooth technology.
How does a reading device work?
It is also a reading device that reads printed text by scanning it character by character. It first converts them into machine-readable code and saves them in the system memory.
What is a light pen?
It is a pen shaped device used to select objects on a display screen. It is quite like the mouse (in its functionality) but uses a light pen to move the pointer and select any object on the screen by pointing to the object.
What is a mouse?
The mouse is a small device used to point to a particular place on the screen and select in order to perform one or more actions. It can be used to select menu commands, size windows, start programs etc.
What was the punch card used for in the 1970s?
A punch card used in the 1970s to input Fortran programs into an IBM mainframe computer. Source: Harke, Wikipedia. Fortunately, computers have come a long way since the 1970s, and we can now input data into them using a variety of easy-to-use devices. The most common input devices are the keyboard, mouse, and touch screen.
What is a fashion designer's project?
A fashion designer is working on an e-textile project, a jacket that will light up according to their biometrics and the environment. They're using a Lilypad Arduino computer, plus a variety of input and output devices.
What are the input devices?
The most common input devices are the keyboard, mouse, and touch screen. Portable keyboard, wireless mouse, and iPhone. There are hundreds of other input devices, like microphones to capture sound waves, scanners to capture image data, and virtual reality devices to capture our body movements. Computers also receive input from their environment ...
What was the first input for computers?
Input. The very first computers only accepted "punch cards" as input. Computer scientists had to carefully punch out their instructions and then feed the cards into the computer. A piece of card stock with numbers printed in rows and columns, with some numbers punched out.
What can a computer output?
There are many other ways a computer could output data. As long as the output device can interpret a stream of 1s and 0s, it can turn that data into anything - headphones output sound, printers output ink on paper, and projectors output light.
What does the scancode on a keyboard do?
When you press a key, your keyboard sends a particular "scancode" to the computer. The scancode represents the key that was pressed. The scan code is then interpreted by programs running on the computer (like the keyboard "driver"), and the pressed key information becomes available to the other programs running.
Is a color sensor an output device?
If its main purpose is to let the computer communicate information to the user, then it's an output device. Although the color sensor has some input qualities and some output qualities, I would say its main function is to read colors. The other features are there just to help it with its main function (reading colors).
Why does my cursor stop?
The cursor will stop if you let go of the mouse. The computer is dependent on you to move the mouse; it won’t move by itself. As a result, it’s an input device. A mouse is an input device that lets you move the mouse on a flat surface to control the coordinates and movement of the on-screen cursor/pointer.
What is scanner on a computer?
A scanner is an input device that functions similarly to a photocopier. It’s employed when there’s information on paper that needs to be transferred to the computer’s hard disc for subsequent manipulation. Scanner collects images from the source and converts them to a digital format that may be saved on a disc.
What is a joystick?
A joystick is a pointing device that is used to move the cursor on a computer screen. A spherical ball is attached to both the bottom and top ends of the stick. In a socket, the lower spherical ball slides. You can move the joystick in all four directions. The joystick’s function is comparable to that of a mouse.
How many keys does a keyboard have?
Generally, keyboards come in two sizes: 84 keys or 101/102 keys, but currently keyboards with 104 keys or 108 keys are also available for Windows and the Internet.
What is a light pen?
Light Pen. A light pen is a type of pointing device that looks like a pen. It can be used to select a menu item or to draw on the monitor screen. A photocell and an optical system are enclosed in a tiny tube.
What is a bar code reader?
A bar code reader is a device that reads data that is bar-coded (data that is represented by light and dark lines). Bar-coded data is commonly used to mark things, number books, and so on. It could be a handheld scanner or part of a stationary scanner.
What is a monitor?
Monitor. Monitors, also known as Visual Display Units (VDUs), are a computer’s primary output device. It creates images by arranging small dots, known as pixels, in a rectangular pattern. The amount of pixels determines the image’s sharpness.
What are some examples of input devices?
Examples: 1. Keyboard – The keyboard one of the most prominent input devices of the computer, looks similar to typewriters. The keyboard is designed to input data in the format of the text, numbers, and special characters. The computer keyboard is one of the actual examples of input devices in computing. The keyboard is probably the primary means ...
What is input and output?
There are many input and output devices of the computer. These devices are a vital part of the computer to process throughout the functions of the computer. With the input and output devices of the computer, the system wouldn’t full fill the needs of the user.
Why are trackballs used in games?
The use of trackballs became very common in computers to use in video games and for graphic designing applications. People with mobility problems often use trackballs as an input device, since a trackball is more comfortable to manipulate, and they are considered more accurate and durable than a mouse. 4.
How does a computer work?
It can be defined as an electro-mechanical device that allows a user to input the data into a computer, by usually typing on a keyboard, or by clicking a mouse, by which we can input data into the computer. The computer accepts instructions from the user and converts the received data into machine language to display the output results .
What is a keyboard in a computer?
The computer keyboard is one of the actual examples of input devices in computing . The keyboard is probably the primary means of communicating for the user with a computer system. Tip – Read all the 9 Types of Keyboards with pictures as per the needs and comfort. 2.
What is output device?
Meaning: Output devices are also the electronic parts of the computer. These are the part of computer hardware equipment which converts the accepted input information into readable form. It can be text, graphics, audio, or video.
What does "I/O devices" mean?
Meaning: I/O devices or (both input and output devices) are those devices that have both the functionality at the same time. In Short, a device that inputs the data gives output results at the same time by itself.
How does a wireless mouse work?
A cordless or wireless mouse communicates with the computer via radio waves (often using BlueTooth hardware and protocol) so that a cord is not needed (but such mice need internal batteries). A mouse also includes one or more buttons (and possibly a scroll wheel) to allow users to interact with the GUI.
How does a mouse work?
The mouse pointing device sits on your work surface and is moved with your hand. In older mice, a ball in the bottom of the mouse rolls on the surface as you move the mouse, and internal rollers sense the ball movement and transmit the information to the computer via the cord of the mouse.
What is a trackball?
Trackpoint. The trackball is sort of like an upside-down mouse, with the ball located on top. You use your fingers to roll the trackball, and internal rollers (similar to what’s inside a mouse) sense the motion which is transmitted to the computer.
What is a CRT monitor?
The traditional output device of a personal computer has been the CRT (Cathode Ray Tube) monitor. Just like a television set (an older one, anyway) the CRT monitor contains a large cathode ray tube that uses an electron beam of varying strength to “paint” a picture onto the color phosphorescent dots on the inside of the screen. CRT monitors are heavy and use more electrical power than flat panel displays, but they are preferred by some graphic artists for their accurate color rendition, and preferred by some gamers for faster response to rapidly changing graphics.
How many buttons does a mouse have?
The traditional PC mouse has two buttons, while the traditional Macintosh mouse has one button. On either type of computer you can also use mice with three or more buttons and a small scroll wheel (which can also usually be clicked like a button).
What is a multifunction printer?
Multi-function printers are available that not only operate as a computer printer, but also include the hardware needed to be a scanner, photocopier, and FAX machine as well. Dot matrix printers use small electromagnetically activated pins in the print head, and an inked ribbon, to produce images by impact.
What is flat panel display?
A flat panel display usually uses an LCD ( Liquid Crystal Display ) screen to display output from the computer. The LCD consists of several thin layers that polarize the light passing through them. The polarization of one layer, containing long thin molecules called liquid crystals, can be controlled electronically at each pixel, blocking varying amounts of the light to make a pixel lighter or darker. Other types of flat panel technology exist (such as plasma displays ) but LCDs are most commonly used in computers, especially laptops.
What is an input/output device?
Alternatively referred to as I/O, input/output is any software or hardware device that is designed to send and receive data to and from a computer hardware component. For example, a computer mouse can is only an input device, because it can send data but cannot receive any data back. A computer monitor is an output device, ...
How does a microphone work on a computer?
A microphone can connect to a computer through the sound card, allowing the sound card to accept sound (input) and send it to the computer. If you save files to access on other computers or want to copy files from one computer to another, use a USB flash drive. How to copy information from one computer to another.
What would happen if a computer didn't have an input-output device?
Without an input-output device, computers would not be able to access data and save data. A computer's operating system, like Windows or macOS, are stored on a hard drive and accessed by the computer. Without the hard drive, a computer could not access an operating system and could not function.
What would happen if a computer didn't have a hard drive?
Without the hard drive, a computer could not access an operating system and could not function. To access the Internet, a computer needs to use an input/output device, like a modem or network card. Without either of those, the computer could not connect to or access the Internet.
What is the most commonly used input/output device?
The most commonly used input/output device is a hard drive, which is found in every computer. However, there are other input/output devices used by users and computers. Types of input/output devices.
Do all computers have a hard drive?
All computers have a hard drive, as they could not function without it. Today, most computers have a CD-RW or DVD-RW drive, network card, and a sound card (or onboard sound on the motherboard), which are all input/output devices.
Overview
In computing, input/output (I/O, or informally io or IO) is the communication between an information processing system, such as a computer, and the outside world, possibly a human or another information processing system. Inputs are the signals or data received by the system and outputs are the signals or data sent from it. The term can also be used as part of an action; to "perform I/O" is to perform an input or output operation.
Interface
An I/O interface is required whenever the I/O device is driven by a processor. Typically a CPU communicates with devices via a bus. The interface must have the necessary logic to interpret the device address generated by the processor. Handshaking should be implemented by the interface using appropriate commands (like BUSY, READY, and WAIT), and the processor can communicate with an I/O device through the interface. If different data formats are being exchanged, the interf…
Channel I/O
Channel I/O requires the use of instructions that are specifically designed to perform I/O operations. The I/O instructions address the channel or the channel and device; the channel asynchronously accesses all other required addressing and control information. This is similar to DMA, but more flexible.
Port-mapped I/O
Port-mapped I/O also requires the use of special I/O instructions. Typically one or more ports are assigned to the device, each with a special purpose. The port numbers are in a separate address space from that used by normal instructions.
Direct memory access
Direct memory access (DMA) is a means for devices to transfer large chunks of data to and from memory independently of the CPU.
See also
• Asynchronous I/O
• I/O bound
• Input device
• Output device
External links
• Media related to Input/output at Wikimedia Commons