IBM i uses an object model that is different from the folder-and-file mindset many people expect. Once you understand libraries, objects, and members, the rest of the platform starts to make sense faster.
The three terms
- A
libraryis a container used to group objects. - An
objectis a named item stored on the system. - A
memberis a source or data element inside certain objects.
This model is central to IBM i administration and development.
Libraries
Libraries help organize work into manageable areas. They are often used to separate application code, test data, production data, and shared utilities.
Beginners sometimes think a library is the same thing as a folder. That analogy is helpful at first, but IBM i libraries also carry system meaning, authority behavior, and naming conventions that matter in production.
Objects
Objects are the real building blocks. Programs, files, commands, queues, and many other things are all objects. The object type tells the system how to treat them.
That is why IBM i discussions often focus on object type as much as on name.
Members
Members usually appear in source physical files and similar structures. They are the pieces that hold source code or related content inside a shared object.
For example, a source file might contain multiple members, each holding one source item. This is a common pattern in IBM i development and maintenance.
Why this matters
If you learn the object model early, you avoid a lot of confusion later:
- You know where code lives.
- You know how data is organized.
- You know why names matter.
- You can navigate the system more confidently.
Where this fits in the series
This article builds on the foundation articles already published in the series and prepares the reader for the next programming topic later in the cluster.