I don't know the first thing about software licensing, so I was hoping someone could clarify something for me. I'm leaving my university this year, so I won't have access to a lot of software packages that I currently use. Looking at purchasing some, I've noticed that in a some cases you can buy an identical "home use" package for a greatly reduced price. These packages say that they can't be used for commercial or academic purposes, though. What does that mean, exactly? I don't plan to do anything more than mess around as a hobbyist, but I'm a bit confused by the whole thing. If I did some work on my home version of some package and then wanted to publish a figure that I made in the program, is that a violation of the license? How about simply reporting a number that was calculated in the program? Or reproducing code? What actually happens in these cases? I guess I'm just not sure what "academic use" is prohibited here. Like I said, it surely won't be an issue, but the whole thing seems strange to me and I wanted some clarification.