Ask TUAW: What's the first thing to know about OS X?

Marc Perton over at DownloadSquad
has been running a weekly segment titled "Ask DownloadSquad," where they post a reader-submitted question and open the topic up for coffee talk. Well, I got inspired (thanks Marc!) and I've finally come up with the first question I'd like to use. or So ladies and gents, I'd like to present you with the first post of a new weekly segment: Ask TUAW.

To briefly set this one up with a little background: I overheard a conversation the other day, where one friend was telling the other that he's brand new to computers, and has to start teaching OS X and art software for a class – crazy, I know. Then I thought about my mom,
who is so new to computers that she just barely grasps the concept of the mouse.

This all brings me to our first Ask TUAW session: what do y'all think are the most important things to understand about OS X and computers in general not only for those just switching over to OS X from another OS,
but for those who, like my mother, have never used a computer
and don't yet grasp fundamental concepts like a mouse or the internet.
This could be anything, and I'll wait to post my thoughts in the comments later in order to truly start this off as open as can be.

So: go forth! Discuss! Let the ideas fly, and let's have some fun. For future Ask TUAW sessions we'll be accepting questions from y'all through our tips form, just use the subject: Ask TUAW and we'll post one each week.