Many were predicted to die on January 1, 2000 โ but mainframe legacy applications are still around. In some ways, they are the zombies of the IT world. Now they are running on the cloud as well. What are they and why are they still alive?
Mainframe application development was in its heyday during the 1960s, 1970s and into the 1980s. During this time, hundreds of programmers labored in the salt mines of large IT shops, coding custom programs for corporations. These were one-off systems, each designed specifically for the unique needs of the enterprise. The user interface might employ unconventional hotkeys to iterate through screens or have custom code for specialized business logic or priority clients.