# Columns

> Themed column series organized along the main work tracks.
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Entry points to themed columns. Each column follows one main thread, with articles forming a long-term reference.

## Contents

- [Architecture](/en/architecture/)
  - [Applying DDD Aggregates in a Banking ECIF](/en/columns/architecture/ddd-aggregate/)
- [Banking](/en/banking/)
  - [ECIF in one read — why customer data must be centralized](/en/columns/banking/ecif-overview/)
- [Data](/en/data/)
  - [Bank Data Governance — metadata before quality](/en/columns/data/data-governance/)

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Section pages:

- [Architecture](/en/architecture/): Hands-on breakdowns of ECIF, core banking, distributed architecture, and DDD.
- [Banking](/en/banking/): Payment clearing, interest and limits, accounts/cards, AML/KYC/CRS — core banking topics.
- [Data](/en/data/): Data governance, encryption and security, sharding, messaging and stream processing.