I want to know about Management Information Systems, from where I can get a master's or post-graduation in this field.

You can explore these colleges, - MNIT Jaipur - Symbiosis - PUMBA - JBIMS - KJ Somaiya - FMS Delhi. Also, you can explore distance MBA from IGNOU/ SCDL/ NMIMS/ Anamali etc.

Management Information System is an academic subject group in many B-schools. You can check for Ph.D. or fellowship programs offered by Iims / other state universities in the area of MS (Management Information System). For the master's level programme, you can check IITs/IIITs/state level institutes