Platforms which support devices from multiple manufacturers

• Java ME This platform generally produces portable applications, although sometimes device-specific libraries exist (commonly used for games), making them non-portable. It is often used to provide simple applications on feature phones. Applications (including their data) cannot be larger than around 1 MB if they are to run on most phones. They must also be cryptographically signed in order to use APIs such as the filesystem access API. This is relatively expensive and is rarely done, even for commercial applications. Java ME runs atop a Virtual Machine (called the KVM) which allows reasonable, but not complete, access to the functionality of the