1 03/04/85 ison 2 3 Syntax as a command: ison name 4 5 6 Function: prints "true" or "false" depending on whether or not a 7 person is registered in the PNT. It then lists all users in the URF 8 who have a last name that matches the name argument. 9 10 11 Arguments: 12 name 13 is the last name of the person who may be registered on the system.