Microsoft briefly surpassed Apple as the most valuable US company on Monday. The last time Microsoft was worth more than Apple was in 2010. The technology industry has changed a lot since then.
The last time Microsoft was more valuable than Apple, the Zune was still taking on the iPod (AAPL, MSFT)
Microsoft briefly dethroned Apple as the most valuable US company during trading on Monday. However, at the end of the day, Apple still had a larger market cap than the Windows giant.