Here are some examples of REST APIs in use:
* To display weather information, weather apps harness public APIs that share weather data.
* Airlines expose their flight times and prices through APIs so travel and ticketing sites can use them.
* Public transportation services usually make their data publicly in real-time via APIs so that mapping and navigation apps (like Google Maps) can use them.
* Twitter allows publishing sites to pull information like tweets, users, tweet streams, and so on. Developers can also write programs to post tweets through the API instead of the website interface.
* In turn, Google Maps hosts several APIs that make its mapping data available to developers. Developers leverage these APIs to palace dynamic maps on their websites or in their apps.
