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When did Siri come out?

“Apple's voice assistant Siri launched on the iPhone 4S in 2011, bringing voice assistants to the mainstream.”

Reference: Apple

What are the different types of laptop batteries?

There are currently three types of batteries commonly used to run people's laptops:
1) Nickel Cadmium (Ni-Cd) batteries were the standard technology for years, but are now out of date.

2) Nickel Metal Hydride (Ni-MH) batteries are a cadmium-free replacement for Nickel Cadmium.
3) Lithium Ion (Li-ion) is the battery you want for your laptop and is the current standard for portable power.

How does a smartphone compass work?

Smartphones have a tiny sensor called a magnetometer that measures Earth's magnetic field to work as a digital compass.

How many people use the internet?

About 5.5 billion people, roughly two-thirds of the world's population, use the internet, according to the International Telecommunication Union.

Another fact

“Apple's voice assistant Siri launched on the iPhone 4S in 2011, bringing voice assistants to the mainstream.”

More from this shelf

What are the different types of laptop batteries?

How does a smartphone compass work?

How many people use the internet?