Cobol
A historic programming language designed for business, finance, and administrative systems.
COBOL (COmmon Business-Oriented Language) is a high-level programming language designed for business applications. Developed in the late 1950s, it was standardized by the CODASYL committee and has since been maintained and updated through various ANSI and ISO standards. COBOL is characterized by its verbose, English-like syntax, which was intended to make programs easier to read and understand by non-programmers, such as business analysts. Its structure is highly regimented, divided into four divisions: Identification, Environment, Data, and Procedure. The Data Division is particularly powerful, allowing for detailed definition of data structures, including complex file handling and record layouts. The Procedure Division contains the executable statements. COBOL excels at data manipulation, file processing, and batch processing, making it a mainstay in legacy systems within finance, insurance, and government sectors. Despite its age, significant portions of critical business logic worldwide still run on COBOL, necessitating ongoing maintenance and modernization efforts.
graph LR
Center["Cobol"]:::main
Pre_cryptography["cryptography"]:::pre --> Center
click Pre_cryptography "/terms/cryptography"
Rel_advanced_propulsion_systems["advanced-propulsion-systems"]:::related -.-> Center
click Rel_advanced_propulsion_systems "/terms/advanced-propulsion-systems"
classDef main fill:#7c3aed,stroke:#8b5cf6,stroke-width:2px,color:white,font-weight:bold,rx:5,ry:5;
classDef pre fill:#0f172a,stroke:#3b82f6,color:#94a3b8,rx:5,ry:5;
classDef child fill:#0f172a,stroke:#10b981,color:#94a3b8,rx:5,ry:5;
classDef related fill:#0f172a,stroke:#8b5cf6,stroke-dasharray: 5 5,color:#94a3b8,rx:5,ry:5;
linkStyle default stroke:#4b5563,stroke-width:2px;
🧠 Knowledge Check
🧒 Explain Like I'm 5
COBOL is like an old, very detailed instruction book for computers that businesses used a long time ago to manage lists of customers and money. It's written in a way that sounds a [bit](/en/terms/bit) like English, making it easier for people who aren't computer experts to read.
🤓 Expert Deep Dive
COBOL's enduring presence is largely due to its robustness in handling large-scale data processing and its suitability for transaction-oriented systems prevalent in financial institutions. Its data description capabilities, particularly the PICTURE clause, allow for precise definition and validation of data types and formats, crucial for financial accuracy. The procedural paradigm, while verbose, promotes structured programming principles. Modern COBOL implementations support object-oriented features and integration with other languages and platforms, addressing the need for modernization. However, challenges remain in finding skilled COBOL developers, integrating with modern web services, and the inherent difficulty in rapid application development compared to contemporary languages. The language's design prioritizes explicit data handling and control flow, which contributes to its reliability but can also lead to code that is less flexible and harder to refactor.