Apple's market value climbed past Microsoft's on Wednesday -- the first time that's happened in more than 20 years -- making it the biggest tech company in the world, according to Reuters.

At the end of the day, Apple's market value stood at around $222 billion, compared to Microsoft's $219 billion, reflecting the changing fortunes of the long-time rivals, as Apple's iPod, iPhone and now iPad have propelled the company into an enviable position.