Fewer are aware that the PC wasn’t IBM’s only internal-politics-driven value giveaway; one of the most important software applications on those mainframes was IBM’s Information Management System (IMS). This was a hierarchical database, and let me pause for a necessary caveat: for those that don’t understand databases, I’ll try to simplify the following explanation as much as possible, and for those that do, I’m sorry for bastardizing this overview!~ Ben Thompson from, https://stratechery.com/2016/oracles-cloudy-future/
And, today this web site is a tech blog.
I’ve read, (technically I am in the process of reading,) everything Thompson has written. I skimmed through this long article since it wasn’t news to me. However, if you take about 10 minutes to read this, you’ll know more about Databases and the Big Kids who made the things which became the things you now use every day, than pretty much everyone else on the planet.