IBM i System Jobs
This IBM Support web page describes many of the IBM i system jobs,
Primer on IBM i Work Control Block Table
This IBM Support web page provides an introductory overview of the Work Control Block Table (WCBT).
IBM i LIC Log Primer
This IBM Support web page provides basic information about IBM i LIC logs (also known as VLOGs).
IBM i Technology Refresh Information
Thie IBM Support page lists the technology refresh levels and related technology refresh group PTF level for the latest IBM i releases.
Roadmap to IBM i Preventive Service Planning Documentation
This IBM Support page is the main page from which you can go to specific PSP documents for various IBM i releases.