GNU is really a toooooo great project!
I love this head, though I don’t know what on earth is this animal… (a goat or a bull?)
This evening I spent several hours on the study of TEXMACS, and there were many surprising features. Actually I just wanted to make some transparencies for a presentation next week, but PowerPoint® is too ugly for me, especially when we use mathematical formulae (the quality is hard to endure!). In contrast, TeX/LaTeX is much better, but it’s a little bit inconvenient, so at last I chose TeXmacs. (This is what I made in TeXmacs)