Application programming interfaces

This topic provides experienced application programmers with the information needed to develop system-level and other i5/OS™ applications using the application programming interfaces (APIs).

• What's new for V5R4
  Find out about major API changes for V5R4.
• Printable PDFs
  Use this to view and print groups of APIs or concepts.
• API finder
  Select this link to access the API finder, a tool that allows you to search for APIs by name or by category. You can even display an alphabetic list of all APIs, all new APIs, all changed APIs, or all exit programs.
• APIs by category
  Select this link to display a list of all API categories.
• Alphabetic list of APIs
  Select this link to display an alphabetic list of all APIs by description.
• API concepts
  Describes the underlying concepts that you need to understand to work effectively with APIs. Among the concepts covered are basic concepts, programming considerations, and terminology.
• Using APIs
  Provides scenarios for and practical application of using APIs.
• Examples: APIs
  Contains example programs that use APIs and exit programs.
• Machine interface programming
  Provides information about creating machine interface (MI) programs.
• Common API programming errors
  Provides information about common programming errors, as well as examples of correct and incorrect coding.