What some of those scary application permissions mean

Knowing when to be concerned over application permissions — and when not to be — is tricky and important

We've all heard about bad apps that steal your valuable data and ship it off overseas, and those discussions always end with one thing -- someone says you need to read an app's permissions before you install it.  Well that's fine, but there is a small problem -- what the heck do those permissions mean?  System tools — automatically start at boot is easy enough to decipher and understand why it's needed, but what about Your personal information —​ read contact data?  Hit the break, and we'll try to figure some of these out together.

Remember, this list isn't 100 percent complete.  For a complete in-depth list we're going to need a guest writer from Google to write it.  The permissions system is micro-managed, with nuances only Google will ever fully understand, so I won't try.  We can talk about a few of them that we do understand to give you an idea why they aren't always as scary as they sound, and why some apps need some of them. 

source: androidcentral