IBM i Alive
IBM i
KindOperating system
Appeared1988
StatusAlive
CreatorIBM
FamilyIndependent
PlatformAS/400 → Power
Also known asOS/400, i5/OS
Sourcewww.ibm.com ↗
The AS/400's operating system — single-level store, object capabilities, and a database you can't remove because it's the OS; still the quiet backbone of mid-market business.
1960198020002020
Ran on IBM AS/400
Created by IBM
OS/400 shipped with the AS/400 in 1988 — an integrated OS+database with single-level storage, capability-based security, and legendary object compatibility (a 1988 program still runs).\n\nRenamed i5/OS then IBM i; still shipping on Power hardware — the midrange line that never died.