4. Raspberry Pi Model B
How do you sell a PC for $35? In the case of the Raspberry Pi, the British foundation which created it reduced computing to its most stripped-down essence. The Model B is a tiny bare circuit board: You supply a power source, a memory card and an operating system, not to mention a display, a keyboard and a mouse. The notion here isn’t to compete with anything you’d pick up at Best Buy; instead, the Pi is meant to help young people learn about technology, including students in countries where even $35 is an imposing chunk of change. But even if you’re not part of the target market, this exercise in inventive minimalism is inspiring.
Read more: http://techland.time.com/2012/12/04/top-10-tech-lists/#ixzz2EL7gbhJX
The instructions below are for installing version Java 7 Update 7 (7u7). If you are installing another version, make sure you change the version number appropriately when you type the commands at the terminal. Example: For Java 6u35 replace 7u7 with 6u35. Note that, as in the preceding example, the version number is sometimes preceded with the letter 
