I have to be a little technical, but if you can handle LiveJournal, you can handle iTunes.
A few definitions:
File types. The songs on a computer may be stored in many ways. Here are the most common for iTunes. ( definitions: file typesCollapse ) Files using these methods will have the extensions ".aiff" or ".aif"; "mp3"; or ".aac" or "m4a" respectively. Capitalization doesn't matter for these purposes.
Importing and Exporting
Getting files into your computer. I will, for the sake of a short article, only deal with getting files off a CD and putting them into iTunes, and then taking the files and burning them onto your own CD. ( definitions: importing and exportingCollapse )