os-808x
    
            
                
                     operating system for Intel 8086 / 8088 	
                
            
             
            
             
            
        
            ... services/functionality
3. Menu Driven Shell provides utilities like RAM check, Disk Viewer, Printer, Clock, Alarm etc.,
4. OS supported simple file concept
5. Security using XOR Encryption
Sources are available in sources section. See the Wiki for screen shots and how to run this OS on DOSBox / Wine environment.