Search in Mac OS X (command + space) and iOS (swipe down from home screen) is called Spotlight.
Did you know that you can search for Twitter hashtags and usernames in Spotlight?
Tapping on the results will take you right to the Twitter app.
We didn't either, until Twitter CEO Dick Costolo mentioned it during Twitter's most recent earnings call.
He said: "And finally, we are also working with Apple to surface great Twitter content and accounts directly in Spotlight Search on iOS and OS X, that also makes it easier and quicker to find great things on Twitter."