1) The document provides an overview of basic computer concepts including hardware, software, operating systems, application software, input/output devices, and the user interface.
2) It describes how to start up and shut down a computer properly, log on and off, and type using a keyboard. Basic mouse functions are also covered.
3) The document discusses choosing the right software for different tasks like word processing, spreadsheets, presentations, and more. It also covers passwords, viruses, and the desktop interface.