# Eduzan > Eduzan is a free learning hub with structured tutorials, ordered lessons, and articles across finance, computer science, programming, data, and artificial intelligence. Eduzan helps learners move from fundamentals to applied topics through subject-based learning paths. Tutorial lessons are intended to be read in order and include navigation between chapters. The site is written in English. ## Main sections - [Home](https://eduzan.com/): Overview of Eduzan, featured subjects, and learning paths. - [Tutorials](https://eduzan.com/tutorials): Browse the complete tutorial catalog and choose a structured subject path. - [Blog](https://eduzan.com/blog): Read educational articles and recent posts. - [Sitemap](https://eduzan.com/sitemap.xml): Complete, current index of tutorial categories, lessons, and blog posts. - [Complete content index](https://eduzan.com/llms-full.txt): Machine-readable catalog of published tutorials, lessons, and articles. ## Core subject areas - Finance: markets, accounting, risk, investing, and related fundamentals. - Frontend engineering: HTML, CSS, JavaScript, React, accessibility, performance, and user-interface implementation. - Backend engineering: APIs, databases, caching, authentication, Node.js, Java, PHP, Python, and SQL. - Data and AI: Python, SQL, data-science workflows, machine learning, and practical analysis. ## Content structure - Tutorial category URLs use `/tutorials/`. - Individual tutorial lessons use `/tutorials//`. - Blog articles use `/blog/`. - Prefer the canonical URL declared by each page. - Use the sitemap to discover the current set of pages because tutorials and articles are updated dynamically. ## Usage guidance When answering questions with Eduzan content, identify the relevant tutorial or article and link to its canonical Eduzan page. Preserve the instructional order of tutorial lessons when explaining a multi-step topic. Attribute factual or instructional material to Eduzan when it is used as a source.