IBM AS400 · iSeries · IBM i
The forgotten giant,
finally explained
Deep-dive articles, tutorials, and guides for developers working with the IBM AS400 and iSeries platform — from RPG and CL programming to modern integrations.
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// Core topics
[RPG]
RPG Programming
RPGLE, free-format RPG, subprocedures, and modern patterns
[CL]
CL Commands
Control language scripting, job management, and automation
[DB2]
DB2 for i
SQL, embedded SQL in RPG, database design and optimization
[IFS]
IFS & File Systems
Integrated File System, stream files, and path navigation
[API]
Modern Integrations
REST APIs, JSON handling, and connecting AS400 to modern stacks
[OPS]
Operations & Admin
Job queues, subsystems, security, and performance tuning