COBOLworx Resources
Explore the documents, histories, manuals, and presentations that shaped COBOL— from its original language development to its continuing role in modern enterprise computing.
Foundations of COBOL
These primary sources and historical works provide a window into COBOL's design, development, standardization, and place in the wider history of programming languages.
The language as its creators defined it
A primary-source record of COBOL's development by the CODASYL Programming Language Committee. This volume documents the language's structure, concepts, and specifications at a formative point in its history.
An insider's account of COBOL's creation
Jean E. Sammet recounts the people, committees, decisions, and compromises that led to COBOL. Her account provides valuable context for understanding why the language developed as it did and how its early design choices were made.
Jean E. Sammet
Sammet's landmark reference surveys the history and characteristics of major and minor higher-level programming languages. Its treatment of business data-processing languages places COBOL within the broader evolution of programming.
A contemporary guide to COBOL on System/360
This IBM Systems Reference Library manual describes COBOL as implemented for Operating System/360, including the COBOL E and COBOL F compilers, IBM extensions, and the major divisions and features of an OS/360 COBOL program.
Technical Resources
Explore the software, documentation, and technical references that support GCC COBOL, GnuCOBOL, and CBL-GDB.
Overview and development resources
Learn about GCC COBOL, its goals, portability, dialect support, and the development architecture behind the compiler.
Released manuals and current development documentation
Browse versioned GCC COBOL manuals and I/O API references for released versions, plus the current development documentation maintained with GCC.
Project documentation and knowledge base
Access the GnuCOBOL project, its programmer's guide, and COBOLworx's GnuCOBOL Knowledge Base.
Source-level debugging for GnuCOBOL
Read the CBL-GDB overview, command reference, and hands-on walkthrough for source-level debugging of COBOL programs.
Selected external perspectives
A curated set of articles on COBOL, mainframe systems, modernization, and the continuing role of COBOL in enterprise computing.
More Historical References
COBOL on a 4K system
A historical COBOL reference for IBM 1401/1410 tape systems.
FIPS adoption of ANSI COBOL
A 1970 paper containing the text of the Federal Information Processing Standards adoption of American National Standard COBOL as Federal Standard COBOL.
Contemporary Perspectives
Modern COBOL conversations connect a vast body of production software with current language standards, evolving platforms, and new career opportunities.
Marty Heyman · FOSSY 2026 and Carolina Code Conference 2026
Marty Heyman will present related talks at two conferences. At FOSSY, the Free and Open Source Software Yearly conference, he discusssed COBOL's history, its continuing importance, and the development of GCOBOL as a COBOL front end for the GNU Compiler Collection. FOSSY took place August 6–9 at the University of British Columbia in Vancouver, Canada.
One week later, Marty will present COBOL — Round 2 at the Carolina Code Conference, a welcoming, community-driven polyglot and cybersecurity event for developers of all experience levels. The conference will be held August 14–15 at Flywheel Coworking in Greenville, South Carolina.
Building on Jim Lowden's well-received 2025 session, The Once and Future COBOL, Marty's follow-up examines the enormous body of production COBOL still used by major organizations. He will compare examples from older IBM-era COBOL with the modern 2023 COBOL Language Standard, discuss the scale and complexity of existing codebases, and share perspectives on the COBOL skills shortage and changing career opportunities.
Historical perspective is valuable. COBOLworx can also help with the practical work of supporting, assessing, modernizing, and extending the systems your organization relies on today.