Subject :ICSO     Class : Class 6 
                                                                        Ans 1:
Class : Class 7 
                                                                                                    
                                                                                                    Unix (/ˈjuː.nɪks/; labeled as UNIX) is a family of multitasking, multiuser PC operating systems that derive from the original AT&T Unix, developed in the 1970s at the Bell Labs research station by Ken Thompson, Dennis Ritchie, and others.
                                                                                                
                                                                                                 
             
             
        