NOOK is a line of Android-powered portable e-book reader devices developed and marketed by Barnes & Noble that competes with Amazon’s Kindle line of e-books.
Like the Kindle, the entry-level NOOK features E Ink (Electronic Ink) technology in a monochrome matte screen display that provides sharp, clear text and reduced glare for extended reading with less eye fatigue. The more expensive NOOK Color and NOOK Tablet devices provide full color LCD screens for also watching video content, running apps and Web browsing in addition to reading e-books.
The Nook devices include built-in Wi-Fi capabilities for downloading books, running applications and Web browsing, and the higher level Nook devices offer touch screen support. The Nook line currently consists of: