Day 1: Understanding the Origins, Purpose, and Importance of COBOL in Modern Computing

 

Introduction to COBOL: The Birth of a Business Language

COBOL (Common Business-Oriented Language) was created in 1959 by the CODASYL Committee — a group of computer scientists, business experts, and government representatives. Their mission was to design a programming language that could be easily read and understood by people from non-technical backgrounds while efficiently handling business data. At that time, most programming languages were highly mathematical and complex, making COBOL’s focus on English-like syntax a groundbreaking idea.

This new language allowed businesses to automate payroll, billing, and data processing with clarity and reliability — a huge advancement for the era of mainframe computing.

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Why COBOL Still Matters Today

Even after more than six decades, COBOL continues to play a critical role in the global financial ecosystem. It’s estimated that over 70% of financial transactions worldwide still rely on COBOL systems running on mainframes. Banks, insurance companies, and government institutions depend on COBOL’s unmatched accuracy and stability.

While many modern languages focus on web development, COBOL remains the trusted backbone for large-scale data processing and enterprise reliability — proving that legacy doesn’t always mean obsolete.

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What You’ll Learn in This 20-Day Journey

Throughout this 20-day learning series, we’ll explore COBOL from its basic syntax to real-world applications. You’ll learn how to write your first COBOL program, understand structured programming concepts, manage data files, and even explore modernization approaches.

By the end of this journey, you’ll gain the confidence to read, write, and understand COBOL programs — a rare yet highly valuable skill in maintaining and upgrading legacy systems that still power today’s digital world.

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