Random Access Memory (RAM)

What is Random Access Memory (RAM)?

The Random Access Memory is a volatile memory or temporary storage device and its use to store working data and machine code and Random Access Memory allows data to read or write in the physical location of data in contact with direct access to storage media such as DVD read/write, CD read/write, and hard disk. Therefore it is a part of the computer’s main memory, which is directly accessible by CPU and it is volatile in nature, it means if the power goes off, the stored information is lost and it is used to store the data that is currently processed by the CPU and most of the programs and data that are modifiable are stores in RAM.

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Printer

What is Printer? Another widely used output device is a printer and it is a computer peripheral device. A printer produces a hard copy of a processed text or a result. A hard copy refers to a permanent human-readable text or graphics taken on physical print media such as paper or transparency. A printer will use toner to provide a quality print on paper, a toner is a replaceable material. Once the toner gets empty we can refill it and reuse it. Most of the printers are used for commercial purposes such as private offices, industries, government offices, photo studios, etc,. Most of the printers are used to print emails, documents, files, images, color photos, color documents, color posts, banners, advertisement posters, etc,. There are the following 5 types of printers such as dot matrix printer, inkjet printer, laser printer, dye-sublimation printer, and plotter printer this are all the printer which uses nowadays for a printing purpose. A printer is characterized by the followin...

Dot Matrix Printer

What is Dot Matrix Printer? A dot matrix printer or impact matrix printer refers to a type of computer printers with a print head that contains a cluster of pins. The pins run back and front on the page and print by impact with striking an ink-soaked cloth ribbon against a paper similar to a typewriter. The Dot-matrix printers can print at a speed of 500 cps. Therefore a low-resolution dot matrix printers use 9 pins and a high-resolution dot matrix printer uses 24 pins. Then the low-resolution dot matrix is use to apply ink on the surface for layout. In this a printer is able to print different patterns but not only the specific characters. Then a Dot-matrix printers are work as a non-impact method such as laser printers or inkjet printers where they also use the same process for printing. In this each dots produce by a wire or pin which is a tiny metal rod. The tiny electromagnet give the power to move forward directly small levers and a ribbon mask holder which facing the papers...

OMR Scanner

What is OMR Scanner? The OMR scanner puts a shining beam of light on the document and detects the marked area from unmarked ones. This is possible because a marked area reflects more light in comparison to an unmarked area. An Optical Mark Recognition technique is use when students have appeared for objective type tests and they had to mark their answer by darkening a square or circular space by pencil. These answer sheets are directly fed to a computer for grading where OMR is use. Then users create their own forms in a word processor by using desktop OMR software and print it by a laser printer. The process of desktop OMR software is to work with an image scanner with the help of a document feeder which produces forms once filled out. For adding marks on OMR sheets a folder inserter equipment is use. In the sequence of black dashes in sheets the marks are added and the folder inserter equipment scans in order to determine and the usage area of OMR sheets are, It normally used for con...

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