Safe mode is where your Nexus 7 is running with most of the apps disabled. This mode is useful when you are having issues with apps force closing or causing other issues and you want to diagnose what's going on. Instructions on how to reboot to safe mode are in the related links below.
There are various types of Nexus devices, but the Nexus 7 is part of that same family.
The 2012 Nexus 7 came out on July 2012. The 2013 Nexus 7 came out on July 2013.
The 2012 Nexus 7 debuted on July 2012. The 2013 Nexus 7 debuted on July 2013 (August 2013 in Canada).
Yes, the Nexus 7 (2013) is Bluetooth Smart Ready certified. The 2012 Nexus 7 supports traditional Bluetooth.
The Nexus 7 is an Android Tablet made by Google. It has a screen size of 7 inches.
In the 2012 Nexus 7, it came with a single camera (in the front). The 2013 Nexus 7 has two cameras, one in the front and one in the back.
One way is you could copy the CD music into an MP3 format on a PC, then transfer it via USB cable from PC to the Nexus 7. Another way is having the MP3 copy uploaded to Google Music. Then, you can play that CD music streaming on a Nexus 7 (or any device regardless of platform), or if you're not connected, you can configure it to be played in offline mode.
The Nexus 7 is the better tablet.
Nexus 7 tablet 2013 Has a front and rear Camera.
Yes, the Nexus 7 comes in LTE versions.
The 2012 Nexus 7 had a soft leather back. The 2013 Nexus 7 went for a harder shell with a soft touch-coated plate.
The 7 in Google Nexus 7 has not been openly mentioned to stand for anything. However, the recent Nexus tablet iterations (and to some degree, the phone as well) appear to refer to screen size. Both generations of the Nexus 7 have 7 inch and 7.02 inch screens respectively. The Nexus 10 has a 10.1 inch screen. The Nexus 4 has a 4.7 inch screen. The rumored Nexus 5 is supposed to have a 5 inch (or larger) screen.