IBM's marketing department went seriously astray with renaming the platform every other week.
Can we merge these tags into ibm-i and alias the three together (since IBM-i is the current brand name, while AS/400 is the brand most widely used and recognized by programmers for this platform) on SO, and alias the 3 tags together for future.
It's a real pain to have to remember to (a) supply all three in a search, and (b) tag questions with all three. Luckily, no one seems to have used "system-i", or "systemi" yet. Also when aliasing arrives, we need "os400", "i5os", "ibm-i" and "ibmi" linked with these. See, I told you IBM lost it.
I retagged the three questions named i5 to IBM-i. There are 93 and 125 questions tagged iSeries and as400, respectively. I also updated this question to reflect this.