Hello, I currently have Maxima and gnuplot installed and I planned to install R (for data analysis). However I've read about "Sage" software. It seems extremely powerful and seems to do almost anything possible one could dream of. It consists of a programming language and apparently 89 softwares (see http://www.sagemath.org/links-components.html) including Maxima and R. The download file is about 411 Mb and I only have around 6.5 Gb free in my hard disk. I wonder how much space Sage will occupy once I install it entirely. I did not find this information on their website. In these 89 softwares, I am sure that I won't use many/most of them. And I don't think I can choose what to install and what not to. Correct me if I'm wrong. Also, Sage contains "gcc", a compiler that I already have. So I wonder whether I should uninstall gcc and Maxima before installing Sage (I use linux, Ubuntu 12.04) if I were to install it. I would like to use a very powerful software for data analysis, evaluating integrals, solving ODE/PDE's and why not to learn a bit of programming. Do you think that Sage a sage decision for me? Thank you guys.