jamesdhutton

I recently heard on a podcast that IBM is selling more mainframes today than at any other time in its history. This piqued my curiosity. I don't know the first thing about mainframes so I was interested to learn how one goes about coding for a mainframe. But a Google search on this topic brings up very little. Most of the results are on IBM's own website, and even that contains only high-level details. The usual places like Stack Overflow and YouTube have a dearth of info on IBM mainframe programming. So, my question is: why?

The most likely explanation would be that there are hardly any mainframe developers. But IBM's website proclaims that "ninety percent of Fortune 500 companies rely on the IBM Mainframe" and "eighty percent of the worlds corporate data resides or originates on the mainframe." If that's true then surely there must be a reasonable number of mainframe developers out there? And if there are, then why is there so little info for them on the web? Is the knowledge proprietary and secret? Or is it just somewhere other than the usual places?

I would be really interested to hear from anyone with knowledge about this.