Advertisers can mix and copy ad campaign data within third-party services that use the AdWords API.

FORBES: Google Triumphant: The Company's Post On FTC Case

Jolicloud is a stripped down operating system that, instead of running software, connects to Web services using their application programming interface (API).

FORBES: The Disposable Operating System

Once upon a time, Netflix was proud enough of its public API which enabled third-party services and apps to serve up its data and content in different ways that it opened a gallery to display them.

ENGADGET

Unlike services like Facebook and Twitter, which invited third-party developers to build on top of their platform and then turned around and offered competing services, App.net is conceived as a pure API a set of programming instructions that let developers access a real-time feed.

FORBES: Twitter Alternative, App.net, Builds A Developer Ecosystem

Ford has done well to encourage developers to tailor their services for Ford SYNC, courting them by releasing a free API, and maintaining the apps fundamentally just need to run on the iPhone.

FORBES: Ford And GM Forge Different Wireless Paths

Earlier this week the streaming hi-fi hardware maker Sonos announced that it was opening up its API (Application Programming Interface) so that music services could build apps - and those already include Spotify.

BBC: Spotify goes apptastic

According to TechCrunch, buying TokBox added new services that Telefonica could offer developers through its BlueVia Application Programming Interface (API) platform: these already included voice, messaging and billing APIs when the TokBox deal closed.

FORBES: If You Can't IPO, Telefonica Might Help

With the new API, developers can build customized tools for marketers on third party services.

FORBES: LinkedIn Targets Ad Growth With New Ads API

The 7digital API is already used by numerous consumer electronics brands to create integrated digital music services for mobile devices, including Samsung, HTC, Acer and RIM.

ENGADGET: 7digital named European music partner for Toshiba connected TVs