You got a .rar file and you don't how to open it, some one asked you to send him "a rar file" or you just need a good archiving software? Download and install WinRAR.
Kevin is a very resourceful 15-year young boy from Sierra Leone, who make electronic devices by himself using spare parts from trash. His skills were also noticed by the famous MIT, watch his inspiring story.
Windows Phone 8 powered phones come with the Microsoft Office apps and Excel being one of them. Let's learn how to use a simple but useful sum formula to add up the values.