Mathematica uses lists as an efficient way of expressing many of it own built-in commands, and also when managing data. Lists are always denoted in Mathematica by their enclosure in braces. e.g. {a,b,c} is a list in Mathematica. The notebook that you're about to start is intended to get you used to the basics of working with Mathematica lists.
Remember, as we said in the introduction to the first notebook, in order to tell Mathematica that you want it to actually evaluate what you have typed, hit the ENTER key over on the extreme right side of your keyboard on the numeric keypad. Again, don't confuse this with the RETURN key, which merely starts a new line of text.
You can now switch to the actual Mathematica practice notebook by
clicking on the button at left. It will take a while to start up! Don't forget to come back
here when you're done by using the Applications menu! (You can also use this
menu just to come back here to reread the instructions.) See you in a few
minutes.
Welcome back! Hopefully everything went well. You're now finishing learning about Lists in Mathematica. You may now go to the Table of Contents for the Mathematica Basics Labs, or simply quit.