1. Printer :
An external hardware output device called a printer’s job is to take the text and graphic output from a computer and print it out in hard copy. Consequently, it essentially processes the soft copy and creates its hard copy. Based on their speed, price, size, output quality, and intricate design, printers come in a broad range of options.
The price of printers often rises when printing quality does as well. Charles Babbage created the first computer printer in the 19th century for his difference engine, but it wasn’t until 2000 that his mechanical printer design was really implemented.
Features of Printer:
1. Print Speed – It is good to have a printer which prints at least 10 color pages per minute and 20 black-and-white pages per minute.
2. Printer Quality – Black-and-white printers should have a minimum resolution of 600 x 600 dots per inch and color print quality of 1200 x 1200.
3. Duty Cycle – A printer’s duty cycle is the maximum number of pages that should be printed per month. Normally it ranges from 20k-25k pages per month.
4. Ink Replacement Costs – It is the yield that can be expected from the ink or toner cartridge.
5. Copy Speed – Once the scanner has created a reproduction of the image the user wants copied, the speed at which copies of that image are produced is important.
2. Scanner :
A scanner is an input device that regenerates an image from a source object to produce an identical image for display or processing. Specifically, it scans documents such as photos and text pages and converts them to digital format. This creates an electronic version of the document that you can view and modify on your computer. A machine that recognizes optical characters.
Feature of Scanner:
1. Resolution – It refers to the quality of the scanner which is based on how many pixels it is able to sample.
2. Scanning Area – The scanning area simply refers to the document size a scanner is able to accommodate.
3. Compatibility – It refers to the ability of scanner to work with other software and computer parts.
4. Scanning Speed – Generally high quality resolutions will require longer scanning times and thus, scanning speed contribute to one of the important feature of scanner.
5. Scanning Method – There are two types of scanning methods that are used, namely the charge-coupled devices, or CCDs, and contact image sensors, or CIS.
