What are some things that every computer user should learn? What things do you wish every computer user knew? What are some of the biggest benefits that individuals and/or society could reap if computer users learned these things?
Please boost, I honestly want as many serious answers as possible. Feel free to answer variations of the question for different levels of "computer users", such as programmers, office workers who use a computer 4+ hours per day, phone-only users, etc.
@willghatch Playback usually doesn't let you _change_ the content, though you may be able to control how it is presented -- skipping forward or back, louder/softer, faster/slower, brighter/darker, etc.
Text players are often called "readers" or "browsers": PDF reader, Web browser, eBook reader.
Again, editors can be used to play back -- opening and reading (but not changing) a Microsoft Word file, say. But a simple reader won't change the underlying content.
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