Abstract: An efficient mechanism for terminating applications of a data processing system is described herein. In one embodiment, in response to a request for exiting from an operating environment of a data processing system, an operating system examines an operating state associated with an application running within the operating environment, where the operating state is stored at a predetermined memory location shared between the operating system and the application. The operating system immediately terminates the application if the operating state associated with the application indicates that the application is safe for a sudden termination. Otherwise, the operating system defers terminating the application if the operating state associated with the application indicates that the application is unsafe for the sudden termination.

Abstract: An efficient mechanism for terminating applications of a data processing system is described herein. In one embodiment, in response to a request for exiting from an operating environment of a data processing system, an operating system examines an operating state associated with an application running within the operating environment, where the operating state is stored at a predetermined memory location shared between the operating system and the application. The operating system immediately terminates the application if the operating state associated with the application indicates that the application is safe for a sudden termination. Otherwise, the operating system defers terminating the application if the operating state associated with the application indicates that the application is unsafe for the sudden termination.

Abstract: Saveless documents are disclosed. According to some implementations, a method can include displaying a current version of a document in a first user interface of a computing device, receiving an indication to display previously saved versions of the document, and, in response to receiving the indication, displaying a second user interface having the current version displayed in a first portion of the second user interface and a particular previous version of the document displayed in a sequence of previous versions of the document in a second portion of the second user interface. Methods can include automatically saving documents and creating versions of documents. A method can include automatically restoring the layout of documents on a display. A computer-readable medium and system for performing the methods are also disclosed.