Windows is an operating system that manages other programs and files. It has evolved over several versions from Windows 1.0 to the current Windows 10. The document then describes the functions of various keyboard keys in Windows, such as the Shift, Alt, Windows, Delete, Backspace, Enter, Tab, Insert, Num Lock keys and key combinations like Ctrl+C. It also discusses file properties like file size, units of measurement, and how to view file size. Finally, it provides tips for organizing files and folders in Windows through naming, creating subfolders and structuring them logically from top down.

1. Windows