Heritage Archives organizes its materials under 405 topics, using a unique classification system based on the alphabetical order of English keywords (e.g., Archeology–15, Biography–36, Women–355). Some topics are further subdivided:

• Local History (189) is broken down by districts (e.g., Rajshahi → 189.54, Barendra region → 189.54(a))
• Periodicals like newspapers, journals, and little magazines fall under Topic 243
• Political parties fall under Topic 249.

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