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Unisys
Learn all you need to know about Unisys at this site. You can get the latest news about the company, find out about career opportunities, learn about their services, software, and hardware available, and a lot more.
Wikimedia
Wikipedia: Peripheral
This site from Wikipedia includes a basic definition for what a computer peripheral is. Also distinguished are items that are considered peripherals and items that are not. Links are provided for additional information.