COBOL vs Modern Languages: What Developers Can Learn from COBOL’s English-Like Design

Many developers smile ironically when they hear the word COBOL.

They imagine green screens, ancient mainframes, and programming practices frozen somewhere in the 1970s. Yet every day, millions of banking transactions, insurance operations, and government systems still depend on COBOL applications running quietly behind the modern digital world.

This raises an uncomfortable question for modern software engineering:

If COBOL is so outdated, why has it survived for more than sixty years?

Part of the answer lies not in hardware, performance, or even legacy systems.

The real answer is readability.

Long before “Clean Code,” “self-documenting software,” and “maintainability” became fashionable engineering concepts, COBOL was designed around a simple but revolutionary idea:

Programs should be understandable by humans.

And not only by programmers.

COBOL was intentionally designed so business professionals, managers, analysts, and developers could all read the logic of a program with minimal ambiguity.

Ironically, many principles celebrated today in Python, Java, and C# were already central ideas in COBOL back in 1959.

The Radical Idea Behind COBOL

When COBOL appeared, most programming languages were heavily mathematical.

Languages such as FORTRAN were designed primarily for scientists and engineers. Programs often resembled formulas more than business procedures.

COBOL introduced a different philosophy.

Instead of focusing on mathematical elegance, it focused on business communication.

The language emphasized:

• readability,
• clarity,
• maintainability,
• and portability across systems.

This was a major shift in thinking.

The designers of COBOL understood something extremely important:

Business software survives far longer than hardware.

A payroll system or insurance platform might remain active for decades. Therefore, the code needed to remain understandable not only to its original authors, but also to future generations of developers.

That insight proved remarkably accurate.

COBOL Was Designed for Business Professionals

One of the most unusual aspects of COBOL was its English-like syntax.

The language was intentionally verbose because verbosity improved clarity.

Consider the following statement:

ADD TAX-AMOUNT TO FINAL-INVOICE-TOTAL.

Even someone with no programming background can reasonably infer what the instruction does.

Now compare that with a modern equivalent:

finalInvoiceTotal += taxAmount;

The Java version is shorter. The COBOL version is arguably clearer.

This illustrates a fundamental philosophical difference.

Modern languages often optimize for:

• developer efficiency,
• compact syntax,
• abstraction,
• and expressive shorthand.

COBOL optimized for:

• explicitness,
• readability,
• and business clarity.

Neither approach is inherently wrong. They simply prioritize different goals.

Comparing Readability Across Languages

Let us examine a slightly larger example.

COBOL

IF ACCOUNT-BALANCE IS GREATER THAN 0
    DISPLAY "ACCOUNT ACTIVE"
ELSE
    DISPLAY "ACCOUNT OVERDRAWN"
END-IF

Python

if account_balance > 0:
    print("ACCOUNT ACTIVE")
else:
    print("ACCOUNT OVERDRAWN")

C

if (accountBalance > 0)
{
    Console.WriteLine("ACCOUNT ACTIVE");
}
else
{
    Console.WriteLine("ACCOUNT OVERDRAWN");
}

Discussion

All three examples are readable.

Modern languages are certainly more concise and flexible. However, COBOL reads almost like a written business rule rather than programming syntax.

That characteristic was intentional.

COBOL programs were often reviewed not only by programmers, but also by auditors, analysts, and managers responsible for validating business logic.

The language was therefore designed to reduce ambiguity.

Self-Documenting Code Before It Was Fashionable

Today, software engineering strongly emphasizes:

• clean code,
• expressive naming,
• maintainability,
• and readability.

Books, conferences, and coding standards constantly promote these principles.

COBOL encouraged them decades earlier.

Variable names such as:

TOTAL-ANNUAL-INSURANCE-PREMIUM

were not unusual. In fact, they were encouraged.

The underlying philosophy was simple:

Code should explain itself.

This is strikingly similar to what modern developers now call self-documenting code.

COBOL developers were expected to write programs that someone else could understand years later with minimal additional explanation.

That expectation shaped the entire language.

Why Maintainability Matters More Than Cleverness

One of the hidden lessons of COBOL is that software maintenance is often more important than software creation.

Many modern applications are optimized for rapid development:

• frameworks,
• abstractions,
• compact syntax,
• and accelerated deployment.

These tools are powerful, but they sometimes produce systems that become difficult to understand over time.

COBOL emerged in a very different environment.

Enterprise systems were expected to remain operational for decades. A banking platform could not simply be rewritten every few years.

As a result, COBOL developers prioritized:

• stability,
• predictability,
• readability,
• and auditability.

This is one reason COBOL systems still power enormous portions of the global financial infrastructure today.

Their code may not always be elegant by modern standards, but it is often extremely explicit.

And explicit systems are easier to maintain.

The Misunderstood Value of Verbosity

Modern developers frequently criticize COBOL for being verbose.

Yet verbosity itself is not necessarily a weakness.

In many business environments, clarity is more valuable than brevity.

Consider these two goals:

• minimizing typing effort,
• minimizing misunderstanding.

They are not always the same thing.

A concise statement may save time during development. A highly explicit statement may save enormous time during maintenance and auditing.

COBOL deliberately favored the second approach.

That design decision may appear old-fashioned today, but in large enterprise systems it remains surprisingly practical.

What Modern Developers Can Learn from COBOL

Even developers who never touch a mainframe can learn valuable lessons from COBOL’s philosophy.

1. Programs Are Written for Humans

Computers execute code. Humans maintain it.

Readable software reduces long-term cost and complexity.

2. Business Logic Should Be Explicit

Business rules hidden behind excessive abstraction eventually become difficult to understand.

COBOL treated business logic as something that should remain visible.

3. Clear Naming Matters

Descriptive identifiers improve communication between developers, analysts, and stakeholders.

A good variable name often eliminates the need for comments.

4. Maintainability Is a Strategic Advantage

Software that survives decades creates enormous business value.

Maintainable systems reduce operational risk.

COBOL understood this from the beginning.

COBOL’s Legacy in Modern Software Engineering

COBOL is often described as a legacy language.

In reality, many of its core ideas remain surprisingly modern:

• readable code,
• portability,
• structured design,
• maintainability,
• and business-oriented programming.

The language helped shape professional enterprise software development long before modern software engineering methodologies existed.

And despite decades of predictions announcing its death, COBOL continues quietly powering critical systems around the world.

Perhaps the most ironic lesson is this:

In an era obsessed with increasingly complex frameworks and abstractions, COBOL reminds us that simplicity and clarity still matter.

Maybe more than ever.

Final Thoughts

COBOL is often viewed as a relic of computing history. In reality, it solved problems that modern developers still struggle with today: creating software that humans can understand and maintain for decades.

Its English-like syntax was not a limitation — it was a deliberate engineering philosophy.

And perhaps that philosophy deserves renewed attention in the age of increasingly complex software systems.