Describe four game controllers) What is a stylus?

Game controllers are devices that provide input to computer games, While keyboards and traditional mice can Be used as game controllers, the four most popular and specialized game controllers as joysticks, gaming mice, gamepads, and motion- sensing devices

A stylus a pen like device typically used with tablets and mobile devices.  A stylus uses pressure to draw images on a screen, Often, a stylus interacts with the computer trough handwriting recognition software

33 What is a scanner? Describe five types of scanning devices.

Scanning devices convert scanned text and images into a form that the system ‘unit can process. There are five types of scanning devices: optical scanners, card readers, bar code readers, RFID readers, and character and mark recognition devices

What is UPC? MaxiCode? Smart Cards?

UPCs (Universal Product Codes)are widely used by retail stores to automate the processes to check out customers, to change product prices, and to maintain inventory records.

MaxiCode is widely used by the United Parcel Service (UPS) and others to automate the process of routing packages tacking in-transit packages, and locating lost packages.

 Many credit cards, know as smart cards, include additional security in the form of a microchip embedded in the credit card. This chip contains encrypted data that ‘makes it nearly impossible for criminals to forge a duplicate card. Some chips require that you insert the card into a specialized reader, while others only require that you hold the card near the reader.

Describe three common character and mark recognition devices.

Magnetic-ink character recognition (MICR)—used by banks to automatically read those unusual numbers on the bottom of checks and deposit sips. A special-purpose machine known as a reader sorter reads these numbers and provides input that allows banks to efficiently maintain customer account balances.

 Optical-character recognition (OCR)—uses special preprinted characters that can be read by a light source and changed into machine-readable code, A common OCR device is the handheld wand reader. These are used in department stores to read retail rice tags by reflecting light on the printed characters,

 Optical-mark recognition (OMR)—senses the presence or absence of a mark, such as a pencil mark. OMR is often used to score standardized multiple-choice tests.

How are image capturing devices different from an optical scanner

Optical scanners, like traditional copy machines, can make a copy from an original. For example, an optical scanner can make a digital copy of a photograph. Image capturing devices, on the other hand, create or capture Original images. These devices include digital cameras and webcams.

Describe two image capturing devices.

Digital Cameras

Digital cameras capture images digitally are store the images on a memory’ card or in the camera's memory. Most digital cameras)are also able to record video as well Almost al tablets and smartphones have built-in digital cameras capable of taking images and video. You can take a picture, view it immediately, and even place it on your own web page, within minutes

Webcams

Webcams are specialized digital video cameras that capture images and send them to a computer for broadcast over the Internet: Webcams are built into most smartphones and tablets, Desktop and laptop webcams are either built in or attached to the computer's monitor.

What are voice recognition stems? Siri? Cortana?

Voice recognition systems use a microphone, a sound card, and special software These systems allow users to operate computers and other devices as well as to create documents using voice commands

Define these monitor features: clarity, resolution, dot pitch, contrast ratios, size, and aspect ratio.

The most important characteristic of a monitor is its clarity. Clarity refers to the quality and Sharpness of the displayed images. It is a function of several monitor features, including resolution, dot pitch, contrast ratio, size, and aspect ratio.

- Resolution is one of the most important features. Images are formed on a monitor by a series of dots or pixels (picture elements). Resolution is expressed 3a, matrix of these dots or pixels.

Dot (pixel) pitch is the distance between each pixel. Most newer monitors have dot pitch of 0,30 mm (30 100th of a millimeter) or less. The lower the dot pitch (the shorter the distance between pixels), the clearer the images produced

Contrast ratios indicate a monitor's ability to display itnage8)It complies the light intensity of the brightest white to the darkest black. The higher, the ratio, the better the monitor.

Size, or active display area, is measured by the diagonal length of a monitor viewing area, Common sizes are 15, 17, 19, 21, and 24 inches,

Aspect ratio indicates the proportional relationship between a display's width and height. Typically, this relationship is expressed by two numbers separated by a colon.