jdelator writes to mention ComputerWorld is reporting that Microsoft's Windows Vista has increased their market share steadily every month while their main opponent, Mac OS X, has remained essentially flat. "According to Net Applications, in June Windows Vista accounted for 4.52% of all systems that browsed the Web, up from January's 0.18%. Vista has grown its usage share each month since its release to consumers Jan. 30, hitting 0.93% in February, 2.04% in March, 3.02% in April and 3.74% in May. Apple Inc.'s Mac OS X, meanwhile, accounted for 6.22% in January and hit its high point of 6.46% in May, but it slipped back to 6% in June. If Vista's uptake trend continues, it should pass Mac OS X in Web usage share by the end of August."