When Steve Jobs first introduced the iPhone in January 2007, everyone laughed. Literally burst out laughing as their CEO announced the iPhone that would go on sale June 29, 2007.

Here’s how Jobs described it:

“It’s an iPod, a telephone and an Internet communicator.”

And people in the audience giggled. No one could imagine how the little device would change the world. But it is.

The iPhone went on sale on June 29, 2007, and the world was never the same.

First, a throwback to the original iPhone. It came with 8GB of storage and ran on AT&T’s Edge Network. By today’s standards, it was slow, took bad photos, and had no Siri.

The next iPhone, the iPhone 3G, introduced faster browsing and the App Store.

The iPhone 4 is what really changed the game from carrier-only AT&T to other carriers, including Verizon.

Siri arrived in 2011. 15 years and 34 iPhones later, over 2 billion iPhones have been sold.

Of course, you know the rest of the story.

Today, the iPhone does just about everything its users want and more. A camera that rivals professional DSLRs, apps for everything including watching live broadcasts, playing video games, browsing the internet and controlling smart home devices.

To get a taste of what the BI world was like (before the iPhone), I dug up old Black Friday sales papers from Radio Shack, Best Buy, Target, and Walmart.

There, among the hottest holiday gadgets were a weather radio, GPS, clock radio, video cameras, cameras, radar detectors, answering machine and portable MP3 players.

Thanks to the iPhone and apps from the App Store, all of these things are included on one device.

Before the iPhone, people didn’t have to do anything when they were waiting in line somewhere. Football mums and dads had no devices to browse the internet, play games or post on social media while waiting in the car for training to end.

If you had credit cards, you had to carry them in a purse or wallet. Today, you can store credit cards in the iPhone’s Wallet app. Police directions and location can be done in Apple Maps app or Waze. Soon, drivers in some states will be able to store their driver’s license on their phone.

The iPhone has even replaced the high-end video cameras used by many television journalists.

And don’t get me started on how people shop without an iPhone.

I don’t think Facebook and Twitter would have seen the growth they have without the iPhone. Instagram? There’s no way people are taking pictures with a camera and uploading them to a computer for uploading and posting.

When you stop and think about what the iPhone (and other smartphones really) allow us to do, it’s pretty mind-blowing.

Happy birthday, iPhone. You have accomplished so much in 15 years.