Featured migration resources Enterprise COBOL for z/OS Migration Portal Find information about Enterprise COBOL for z/OS compiler migration all in one place. Read the documentation COBOL Migration Assistant Use this interactive, cloud-based tool to navigate the compiler migration process from COBOL 4 or earlier to COBOL 6 or later. Go to COBOL Migration Assistant Webinar: COBOL migration and performance Register to get service issue help with the code generator and optimizer. Watch the webinar White paper: Migrating to the COBOL 5 and 6 compiler is different! Learn how to get up and run with Enterprise COBOL 5.1 or later. Read the documentation Video: How to Identify Top CPU Consuming COBOL Modules Learn how to identify top CPU-consuming COBOL modules to significantly reduce CPU consumption, processing time, and operating costs. Watch the video (05:28) Videos What's new in IBM Enterprise COBOL for z/OS, 6.3 Discover new features and enhancements in Enterprise COBOL for z/OS, 6.3. Watch the video (04:04) JSON support in IBM Enterprise COBOL for z/OS Get an overview of JSON support with the Enterprise COBOL for z/OS, 6.1 or later compiler. Watch the video (04:45) Debug Non-Optimized and Optimized COBOL Programs with IBM Debug for z Systems Learn how to debug COBOL-optimized modules using IBM Debug for z/OS. Watch the video (21:51) Video gallery Watch all other video resources for Enterprise COBOL for z/OS. Go to video gallery White papers IPCS (Interactive Problem Control System) dump format enhancements in COBOL 5+ Know the improvements of IPCS dump formatting routine to easily locate a program's Working Storage in COBOL 5.1 or later. Read the white paper COBOL Applications: Techniques to Make them Efficient Understand why it is important to stay current with the COBOL compiler versions and gain performance advantages. Read the white paper Other resources COBOL Turns 60 See why COBOL and mainframes are powerful and how to speed up your digital transformation with the latest COBOL compiler. Read the article (link resides outside IBM) Should we still use COBOL? Approach the topic of "Why COBOL" from several different angles. Read the blog Lifecycle for Enterprise COBOL for z/OS products See lifecycle details (lifecycle dates, announcement letters, and other information) for Enterprise COBOL for z/OS products. Check the lifecycle Enterprise COBOL for z/OS documentation library See a collection of announcement letter, data sheet, product documentation, and white paper for Enterprise COBOL for z/OS. Read the documentation Enterprise COBOL for z/OS resources Discover how these resources help you tune and migrate your COBOL applications. Take the tutorial Fix list for Enterprise COBOL for z/OS See a complete list of releases, refreshes, fix packs and interim fixes sorted by version for IBM Enterprise COBOL for z/OS. Read the documentation Rational COBOL RFE community Visit the Request for Enhancement (RFE) Community to collaborate with IBM product development teams and other product users. Go to the community Expert resources to help you succeed IBM Knowledge Center Get information about how to maintain and use the product. Support Find solutions by using Support Search or open a Support Case. Community Get technical tips and insights from others who use this product.