It was a programming language, not an operating system.

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Google is accused of using the Java programming language in its Android mobile operating system unlawfully.

BBC: Oracle building

The idea, says Buell Duncan III , IBM's general manager for ISV and developer relations, is to create a network of companies large and small, which are conversant in both nonproprietary, or open, computing standards, like the Linux operating system or the Java programming language, and IBM's suite of hardware, middleware and services.

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Windows Me will be Microsoft's last operating system based on its 20-year-old DOS programming technology.

CNN: Microsoft launches new consumer Windows program

For all the talk of wanting improved battery life, the limits of technology (and mangling background tasks in the Operating System) mean it is unlikely that current battery technology or programming techniques will lead to any significant increase in battery life in the current physical space given over to the battery.

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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

Bug-for-bug compatibility is a problem, but breaking backward compatibility would be a much bigger problem, so even as the lowest layers of the operating system are revised and rewritten, the layers that applictions talk to (the application programming interface, or API) are carefully tested to ensure that no changes are visible to the application.

FORBES: What Is So Great About Microsoft?

Their strategy is to own the file formats, programming interfaces, communications architecture, development tools and tools that connect applications to applications and applications to the operating system.

BBC: News Online's Kevin Anderson