Bluetooth use forms of spread spectrum radio links that result in signals moving around within a wide band in ways that enable sharing of the spectrum by multiple devices. Bluetooth uses the frequency band (2.4 Ghz). Bluetooth establishes a very low power, short range (up to 10 meters) communications link between two devices. Bluetooth is the communications technology. It was developed at Google Labs by a team led by MIT's Hal Abelson. In MIT App Inventor, we program using visual programming are called Initial Learning Environments (ILE). MIT App Inventor is an innovative programming and app creation that transforms the complex language of text-based coding into visual, drag-and-drop building blocks. App Inventor allows the user to create apps for the mobile operating system Android. App Inventor developed by MIT is a visual programming development environment.
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