These are all entries bearing the tag usability.
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Shutdown Philosophy
One of the core guidelines of computer usability is this: Always let the user undo his actions, if possible. There are many good reasons for this. People make mistakes, and the more lenient we can be with that, the better. It lets users experiment and explore your interface and get used to it without fearing permanent data loss. Yet, today I ran into something that I couldn't undo: Shutting down the computer.