What is the best software technology to learn for IT jobs?

I have completed Engineering in Electronics and want to know what is best technology to learn to get a job? ANSWER TO THE ABOVE QUESTION Among the numerous software technologies, the ones that are most in demand are Java developers, Dot net developers, SAP professionals, Red Hat certificate engineers, CISCO certified technicians, and Mainframe professionals. While each of the certifications has importance, getting the job entirely depends on the knowledge and expertise of the person.