In the olden days before the IBM System i... in fact wind back a few years earlier until you get to the old IBM iSeries hardware... dont stop... keep going back into history until you get to the venerable IBM AS400 system... The software that was initially launched to allow PC's to connect to the AS400 was called CLIENT ACCESS. An installable image of Client Access (now called IBM i Access for Windows) can usually be found on the system in the IFS path "/QIBM/ProdData/Access/Windows/Install/Image" or "/QIBM/ProdData/CA400/Express/Install/Image".
So - just for my reference:
For operating system versions prior to version 6:
For operating system version 6 and later (i6.1, i6.2. i7.1)
- 32-bit: /QIBM/ProdData/Access/Windows/Image32
- 64-bit AMD: /QIBM/ProdData/Access/Windows/Image64a
- 64-bit Itanium: /QIBM/ProdData/Access/Windows/Image64i