Definition: The word 'Windows 7' refers to Windows operating system, developed by Microsoft in 2009. It was primarily for personal computers but has now been extended to include laptops and tablets as well. The operating system's purpose is to provide a user-friendly interface on which applications can be installed or run. Its most significant feature is the ability to customize and personalize settings based on the user's preferences, offering a wide range of software and services from Microsoft partners and third-party developers.