When you get the chance to take a look at the IT systems of financial institutions, telcos, and other big companies, where availability has been a key business concern for decades, you’ll find, that some critical operations run through some obscure systems, in many cases accessed via nostalgic green-on-black terminals, the intricacies of which only a few people inside the company truly know. These systems might be IBM i’s – or as many senior folks know, “AS/400” or “iSeries” –...
