With all the noise about iOS 7, you might have forgotten about one of iOS 6’s least-known features: Guided Access, which lets you lock down apps and interface elements to protect your iPad or iPhone from prying eyes or rambunctious kids. Rene Ritchie of iMore gives an overview of how to use this feature, including how to simulate a “Guest Mode.” follow link
Sleep (and Lock) Your Screen
When you are walking away from your computer, it's fairly common practice to start your screen saver and lock your screen. But did you know that there is a built-in keyboard shortcut in Mac OS X to sleep the screen?
Press Control-Shift-Eject and your monitor sleeps without engaging the screen saver.
- ExtraBITS for 17 June 2013 (17 Jun 13)
Lock Down Your iOS Device with Guided Access
Check out the Take Control ebooks that expand on the topic in this article: