Mr. R.D. Sivakumar is an Assistant Professor of Computer Science and Head of the Department of M.Com.(CA) at Ayya Nadar Janaki Ammal College in Sivakasi, India. He provides his contact information including mobile number, email, and website. The document then defines storage class in C programming, noting that it determines the scope and lifetime of variables and functions. It lists the main storage classes as auto, register, static, and extern.