I saw Steve Jobs give his last WWDC presentation — and that was when I knew Apple could last for 50 years and beyond

We're celebrating Apple's 50th birthday with a week of content about the tech giant. It covers everything from personal recollections from our writers to the greatest — and worst — Apple gadgets as voted by you, and you can read it all on our 50 years of Apple page.

I had no idea I was watching a genius's swan song. Sure, Steve Jobs was painfully thin, pacing the WWDC 2011 stage methodically as he walked through iOS 5, the new iCloud, and macOS Lion, but the audience was mesmerized. Jobs was smart, engaged, excited, and funny. He was Apple.

Jobs, the man who founded and built Apple along with cofounders Steve Wozniak and Ronald Wayne, would step down from Apple a few months later, and on October 5 that year he died.

Apple didn't falter. Tim Cook slid into the driver's seat without ...