I admin a few of iSeries, one large LPAR with half a dozen others. We have zSeries and pSeries around too and nothing small. With regards to iSeries we have de

I admin a few of iSeries, one large LPAR with half a dozen others. We have zSeries and pSeries around too and nothing small. With regards to iSeries we have developers who have put in place more than a few REST services both with IBM code and Profound Logic code. IBM provides both custom web service programs (think collection of DLLs) and other simpler interfaces. The key is you can reuse a lot of existing code by putting a good web interface on the front of it and your customers would never know. The number of large companies using the platform is quite high and includes many big names people would not expect as well as a certain major league sport. Overseas it seems more accepted to say you are on one. Good names for iSeries development are Jon Paris and Scott Klement. See Scott's page at https://www.scottklement.com/ https://www.scottklement.com/ the standard language for coding, RPGLE has morphed through the years to where it is as free form as any other language while being 100% backwards compatible, the confusing part is you can mixed fixed format and free form stuff all at once. With ILE programming you can bind in C and JAVA too. For the most part these hang on and get new deployment because of a combination of code that works every day and that business math while simple has to be sure. Throw in that the system is in effect a DB2 database with full support for SQL and more and its easy to see its longevity. Now if someone can convince IBM to not keep renaming it.