sfcrazy (1542989) writes "Ubuntu, the world's most popular GNU/Linux based operating system is celebrating its 7th year today. Ubuntu was first released on 20 October 2004. In these 7 years Ubuntu has changed the GNU/Linux desktop segment by making it more useful for ordinary user." Link to Original Source
Quantum Mechanics is a lovely introduction to Hilbert Spaces!
-- Overheard at last year's Archimedeans' Garden Party