Input+Devices

-Keyboards usually use a QWERTY layout. -If you have wrist pain you can get an ‘ergonomic keyboard’ || -It is usually used next to the computer if a wire connects it. -It can be use anywhere if the keyboard is wireless (connected by Bluetooth) -It is part of the laptop so you can take the laptop anywhere to use the keyboard. || -Little practice is needed to be able to type fast. -Most computers come with it. -Keyboards come in a lot of shapes and sizes for you to pick from. || -Easy to make mistakes if you are not very used to it. -It is hard for disabled people to use it. -Using it a lot can result in repetitive strain injury. || -The left button usually lets you click the thing on your screen that your mouse is on. -The right click button usually brings up a drop-down menu of tasks you can choose make your computer do. || -Mice are usually used for desktop computers that don’t have a touchpad. -It can be connect by a wire or wirelessly via Bluetooth or Wi-Fi. || -Easy to learn how to use. -Works well with a keyboard for data entry. || -Needs to be used on a flat space that is not too smooth close to the computer it is connected to. -Hard for people who have bad coordination. -If the battery runs out, you need replace it manually. || -The two button near the touchpad do the same things as the left button and right button on the mouse. || -Usually comes with a laptop so you can use it wherever you want as the laptop can be taken almost anywhere. || -As it is part of the laptop, it can be taken with the laptop anywhere easily. -Very small movements are required to control it. || -Takes practice to get used to a particular computer’s touchpad speed. -The touchpad will not work if you are wearing gloves, if your fingers are dirty or sweaty. || -It goes in many directions and are sometimes pressure sensitive. || -It is mainly used as a game control and for other bigger machines such as in cars. -It usually comes with the machines as part of it. || -Some people find it easier to control a joystick than a mouse when gaming. -It is more realistic for gaming if the device controlled has a joystick in real life. || -Bad quality joysticks do not respond well (lagging) and break very easily. || -Each button is covered by a sheet that helps the user find and recognise the function more easily. || -In fast food restaurants. -Car stereo systems. -Children toys. -Ipod control keys. || -It enables the user to make fast and easy inputs. -Small children can use it as a toy as it is very || -The keyboard has limited functionality as it doesn’t have many keys. -Most aren’t water proof so || -Iphone/Itouch. -Smart boards. || -Easy to get started with. -No need for other input components. || -Not as good as a keyboard for typing in words. -It is more expensive that mouses. -You need to make sure you don’t accidentally touch other parts of the screen. || -To scan an image, you shine very strong light on to the document and the light reflected back from the image would be detected by a sensor and then use it to build the digital image. || -Flatbed scanners are usually placed on tables and you put the document on the glass surface. -Handheld scanners are moved by hand and then pointed over the document to be scanned. || -Scanned images are digital and can be kept forever without damage. -Flatbed scanners can digitalize the document in to a very high quality picture. || -Scanning images (especially with a bad quality one) sometimes lose quality. -Scanners often need other components such as a computer or a USB. || -Sometimes, you can connect the tablet with the computer using Bluetooth and so it can be used anywhere in the range of the Bluetooth connection. || -It is easier to use as we can control the movements of our hands in a more natural style. -More control of the movements of our hand therefore bringing more accuracy to the drawing. || -Much more expensive than a mouse. -If you lose the pen then the tablet has no more use. -Needs to be carried around in a separate bag/cover. || -A microphone inside another device has to be used with the device. || -Voice recognition devices can be used to convert sound into text. It is much faster and easier than typing. -The sound file can be manipulated and saved. || -Voice recognition devices can interpret the voice wrong. -They can be expensive to buy. ||
 * Input Device-** Any device that inserts data into the computer.
 * ** Input device ** || ** Description ** || ** Where used? ** || ** Pros ** || ** Cons ** ||
 * Keyboard || -A keyboard is used to enter text into the computer. It has a set of alphabet keys, number keys and function keys.
 * Mouse || -A mouse allows you to position the arrow on the screen of your computer by moving it on your desk.
 * Touchpad || -A touchpad is has the same function as a mouse. By moving your fingertips over the flat space, sensors detect the direction and speed it is going and directs the pointer on the screen in that direction and speed as well.
 * Joystick || -You move the joystick to control the direction of the object you are controlling.
 * Concept Keyboard || -Contains buttons on a grid, which can be programmed to perform a specific function.
 * Touch screen || -A device where you can look at the screen and use your fingers to tap what you want to tap. || -ATMs.
 * Scanner || -Used to digitalize a picture, photo, text paper or any hardcopy file.
 * Graphics tablet || -Artists and designers use graphic tablets to draw a picture on a computer. Often they come with a special electronic pen which allows you to hold it and draw on to the surface of the tablet. Your movements would be interpreted as mouse movements and then shown on the screen as the pointer. || -A wire usually connects it and so it would be used in front of the computer.
 * Microphone || -Microphones detect sound and the frequency is transmitted to the computer as an electrical signal. The electrical signal is then converted to digital data using a special software and is then saved as a sound file. || -A hand held/ table microphone can be used anywhere.

-It can activate burglar alarms when the security cameras detect movement. || -They need to be connected to a computer. -Good quality webcams cost are quite expensive. || -The whole system requires a lot of operating people. || -More accurate than people because it usually won’t make errors unless programmed wrong. || -Text input is not recognisable. -If the pencil mark does not fill the whole space or if it is not dark enough, the OMR might not read it correctly. || -Cheaper than paying someone to type. -More accurate unless the document is very unclear. -Newer OCRs can recognise tables, which would allow the user to keep the layout of the document. || -The original document needs to be need and clear or else the OCR will have trouble recognising the letters. -Takes more time than human input if it is for small amounts of text. || -Data on the card can be changed easily. -The card is easy to carry. -The magnetic stripe reader is very simple to use. || -Strong magnetic fields can destroy the magnet strip along with the information stored. -Very limited storage capacity. || -Obvious functions stated on the remote controls. || -They need line-of-sight with nothing in between that would block the signal. ||
 * Webcam || A webcam is a Web Camera. It can take pictures and videos. Videos are made of at least 25 image frames every second. The pictures are connected to make a motion video. Webcams can be built into the computers or connected by a USB and attached to a stand. Webcams can be used for taking pictures, video chatting, security cameras, etc. || -It usually doesn’t need a person watching it all the time.
 * Barcode Reader || Barcode readers scan the barcodes printed on the package of each product. The barcodes are black lines varying in width that contain information about the manufacturer and product code. The barcodes are scanned by a red light from the reader shining on to them and then reflected back and recognised by the reader. || -Gives freedom for the shop to list the prices, as they are not part of the barcode itself but part of the shops system. || -The price of every item needs to be typed in.
 * Optical Mark Reader || The optical mark reader scans a piece of paper with blanks filled in and detects the pencil marks’ reflection. It then sends the pattern to the computer in a computer readable format. OMRs are used to scan multiple choice forms, lottery forms, etc. || -It can process large amounts of data (10,000 forms per hour) without any extra human labour.
 * Optical Character Recognition || Optical character recognition is made up of a scanner and software on a computer. The scanner scans a document containing text which would be detected by the software and then digitalized. After being digitalized, it can be edited using normal word processors. || -Faster than human input.
 * Magnetic stripe reader || Magnetic stripe readers are used to collect information stored in a magnetic strip on the back of cards. The information is then fed back to the connected computer. The magnet strip contains information about the cardholder, card number, card credits, etc. The magnetic strip can contain up to 60 characters. || -PIN security numbers are used to protect the card.
 * Remote controls || Remote controls are used to control a machine in a close distance. It has buttons specified to do a function (see concept keyboard). Remotes can control many things such as the TV, air-conditioning, heating system, lighting system, and the music system. || -It can be used anywhere in a short distance.