SpaceX floated on the Nasdaq stock exchange on Friday, with shares trading 25% above the opening price at one point. The IPO has made Musk the world's first trillionaire, at least on paper.
Steven J. Vaughan-Nichols: You can keep using XP for another year, but do you really want to? While clinging to the 11-year-old OS after Microsoft issues its last security patch in April is defensible ...