Learn COBOL. Cloud everybody uses and everybody is driving the idea of migrating to cloud. But all the top business applications in the world are still in Mainf

Learn COBOL. Cloud everybody uses and everybody is driving the idea of migrating to cloud. But all the top business applications in the world are still in Mainframe it's very secure and less down time 99.98%, 30year old programs still runs perfectly fine. Only the top companies have the Mainframe and it's not open-source so only people have access to it can become experts eventually.