The software that is used to manage thousands of pages is called IETM Level 4. Based on the complexity, the number of pages either Level 3 or Level 4 is used. Level -5 also exists with more functionality i.e. intelligent search, user activity tracking, and other advanced navigation features. For More details, Visit Our Site - www.codeandpixels.net https://www.codeandpixels.net/interactive-electronic-technical-manual-services-levels#videos