If you are more of a visual person and would like to organize your folders and files using different colors, than check it out how to use color labels in Mac OS X.
Airplane mode on a phone is when you disable all the active connections like WiFi, bluetooth and mobile network. Let's see how to enable it so you don't need to turn off your phone on an airplane.
Russia was first in space, the United States was the first on the moon and Japan will now be the first nation to send a robot-astronaut to space that can communicate with humans.