Thanks niste for your response. Basically the assignment is about Simulation of Single-Sever Queuing System.. I am not sure abut what exactly it is since it is the start of the semester and 1 st assignment. SO may be i want to have a pdf of a book . I hope if anyone has the electronic version of the book, would post it here so that it can be of my help. By the way niste, i also hope that i will enjoy simulation class this semester. Thanks Anyway.