Cobol

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Legacy business language still running critical banking, payroll, and mainframe systems.

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Language

Overview

COBOL (Common Business-Oriented Language) is a compiled, imperative, and procedural programming language designed specifically for business use. First appearing in 1960, it was created through a joint effort by CODASYL and the US Department of Defense to establish a portable, machine-independent language for data processing.

The language features an English-like, verbose syntax designed to be highly readable and self-documenting. While it has transitioned to support structured and object-oriented programming in modern standards, its primary contemporary use is maintaining legacy applications deployed on mainframe computers in financial and administrative sectors.

Key features

  • English-like prose syntax
  • Rigid division-based structure
  • Support for batch and transaction processing
  • Object-oriented programming support
  • Highly readable self-documenting code
Pros
  • Highly readable local syntax
  • Excellent portability across mainframes
  • Strong historical support for business data processing
Cons
  • Extremely verbose syntax
  • Lacks a large standard library
  • Often results in hard-to-comprehend monolithic programs
Use this if
You need to maintain or modernize legacy mainframe applications in banking, finance, or government administration.
Skip this if
You are building a modern web application or require a lightweight language with a massive standard library.

Best for

legacy system maintenancemainframe business applicationsfinancial and administrative systems

Alternatives

PL/IFortran

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