Blogger was used as the CMS to build and host the site.
Blogger is primarily used to create blogs but can be used to create websites.
Blogger can contain both dynamic and static content. Dynamic content changes regularly, such as a blog post. Static content is stable and seldom changes, such as a blog page.
TKDTutor is basically a large repository of articles that are stored as pages. For years, using Blogger as a platform for TKDTutor was not possible because Google had a 20-page limit on the number of pages that could be created and used, but now there is no page limit.
Docs was used as a word processor to create, edit, and format the articles.
The articles were then copied to Blogger pages.
Drive cloud storage is used to store all the articles as documents.
Drive allows 15 GB of free storage; however, all files created using Google products do not count against the storage limit.
Sheets was used to create a spreadsheet used to catalog and track all the articles and to manage the navigation structure.
This spreadsheet and the procedures it uses evolved into Blogger Page Manager.