Sasi's Kolam

Forwarded by Mr.JKM Rao:- This is a small riddle kind of a thing. Just imagine a Computer Engineer narrates Ramayana. LAN, LAN ago, in the SYSTEM of I/O-dhya, there ruled a PROCESSOR named DOS-rat. Once he EXECUTED a great sacrifice PROGRAM after which his queens gave an OUTPUT of four SONs - RAM, LSIman, BUG-rat and SED-rughana.