Twenty years ago Monday, Bill Gates officially released Windows 95, ushering in a new era. The operating system featured a graphical user interface, along with a task bar and multitasking support, and it introduced the now-iconic Start button to launch applications. Those Windows 95 features made using a PC a whole lot easier. The Windows 95 launch also was notable for turning a software release — an OS at that — into a major media event. Microsoft pulled out all stops, including having comedian Jay Leno share the stage with Gates.