Apple iPhone

Though it wasn’t the first smartphone, Apple really got the ball rolling with the introduction of the iPhone in 2007. Social media, messaging and the mobile internet wouldn’t be nearly as powerful or universal if they hadn’t been freed from the shackles of the desktop computer and optimized for the iPhone and its dozens of competitors.

Armed with powerful features and able to run thousands of apps, they squeezed more functionality into one device than we’d ever seen before. The mobile revolution also brought the death of point-and-shoot cameras, dashboard GPS units, camcorders, PDAs and MP3 players. Now we use smartphones to shop, as a flashlight and sometimes even to call people. It’s tech’s version of the Swiss Army knife.

Wi-Fi

The smartphone and the internet we use today wouldn’t have been possible without wireless communication technologies such as Wi-Fi. In 1995 if you wanted to “surf” the internet at home, you had to chain yourself to a network cable like it was an extension cord. In 1997, Wi-Fi was invented and released for consumer use. With a router and a dongle for our laptop, we could unplug from the network cable and roam the house or office and remain online.

Internet of things

Wi-Fi hasn’t just allowed us to check email or escape boredom at the in-laws, it also made possible a ton of consumer devices that connect and share information without human interaction, creating a system called the internet of things. The term was coined in 1999, but the idea didn’t start to take off with consumers until the past decade.

Today, there are tens of billions of internet-connected devices around the globe that allow us to perform smart home tasks such as turning on our lights, checking who’s at our front door and getting an alert when we’re out of milk. It also has industrial applications, such as in health care and management of municipal services.

Voice assistants

For many consumers, the heart of the smart home is a voice assistant such as Amazon’s Alexa, Google’s Assistant and Apple’s Siri. In addition to being a prerequisite for controlling devices in your home, their connected speakers will tell you the weather, read you the news and play music from various streaming services, among thousands of other “skills.”

There were more than 3.25 billion voice assistant devices in use around the world in 2019, and that number is expected to more than double to 8 billion by 2023. But they also present a privacy headache, since the devices are essentially internet-connected microphones that transmit your conversations to servers at Amazon, Google or Apple.

Bluetooth

Another wireless communication technology that has proven indispensable is Bluetooth, a radio link that connects devices over short distances. Introduced to consumers in 1999, Bluetooth was built for connecting a mobile phone to a hands-free headset, allowing you to carry on conversations while keeping your hands available for other uses, such as driving a car.

Bluetooth has since expanded to link devices like earbuds, earphones, portable wireless speakers and hearing aids to audio sources like phones, PCs, stereo receivers and even cars. Fitness trackers use Bluetooth to stream data to mobile phones, and PCs can connect wirelessly to keyboards and mice.