Roster101 app is an assistant application that is used to show the staff leave and roster information in the calendar way. These data are generated by the desktop Java Roster application. User can apply leave request through this app. Desktop Roster application is a group of scheduling programs that use various algorthims and techniques of artificial intelligence and operation research to automatically generate a schedule of employees, location, shift for a given periods under specified constraints, e.g. week or month, day-off and skill requirement. These roster software systems suit for various business and companies.