HARDWARE INPUT DEVICESITGS

Strand 3.1 HardwareInput Devices

• KeyboardsPointing devices:• Mice• Touch padsReading tools:• Optical mark recognition (OMR)• Optical character recognition (OCR)• Magnetic ink character recognition (MICR)• Radio frequency identification (RFID), radio tag• Bar code scanners• Magnetic Stripe Readers• Smart card readers

KeyboardSends signals to computer (via cables or wireless)

Straight

• Unnatural• Repetitive stress injuries

Ergonomic

• Natural position• Reduce risk of R.S.I.

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KeyboardTypes

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MouseDesigned to move a pointer around the screen and point to specific characters or objects. Reflected light used to detect movement.

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Touch pad/ Track PadSmall, flat panel sensitive to light pressure.

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Optical Mark Recognition (OMR)Reads marks made by pencil on a printed form into the computer.

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Optical Character Recognition (OCR)Recognizes individual characters on a printed page, so they can be stored and edited as a text.

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Magnetic Ink Character Recognition (MICR)Magnetic ink characters appear at the bottom of checks. Banks use MICR to read the numbers from the bottom of checks to obtain data such as account numbers and bank sort codes. A particular font is used that makes it easy for the machine to discriminate between characters. The ink is magnetized; this makes it immune to creases and dirty marks.

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Bar Code ScannersBarcodes are represented by black vertical bars and are read by a barcode reader. Barcodes are printed on nearly every product you buy; each product has a unique code. When read, information stored in the shop's database is recalled, such as the product name and price. This information later appears on your receipt. The scanning process also assists in stock management, reducing the stock by one each time a product is scanned/sold.

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Magnetic Stripe ReaderMagnetic stripes are built into many plastic cards such as debit or credit cards and personal identity cards. The magnetic strip on the back of the card can hold the personal details of the card owner and, with the necessary PIN, will allow access to secure information, e.g. bank account details. Data stored on the strip is scanned and input into a computer system by a magnetic stripe reader.

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Future Items

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