What is Respberry Pi ?
Raspberry Pi is a low cost computer which is about the size of a credit card that can be plugged into a monitor or a television. You can have wireless keyboard and mouse to operate the computer. This computer can be used for most of our needs like browsing the web, emails, photos, etc
More about Raspberry Pi
Raspberry Pi 2 is out on sale which cost just US$ 35 and the good news is Windows 10 would be free with this.