Computer operating system software has become increasingly standardized  But when a large business with multiple, linked computer systems uses identical operating system software on all of its computers, a computer vandal who gains access to one computer automatically has access to the data on all the computers  Using a program known as a virus,  the vandal can then destroy much of the data on all the computers  If such a business introduced minor variations into its operating system software, unauthorized access to all the computers at the same time could be virtually eliminated  Furthermore, variations in operating system software can be created without any loss of computer compatibility to the business
Ttherefore, it is advisable for businesses to implement such variations
It is not costly for a business to maintain incompatible computer operating systems.