system
21
Unix has been very secure. Mac and Linux is based on it. Though Linux is open source and all its code is out there for any one to look at. I simply stated that IF they could find a way to infect them. It would take some of the heat off MS. But I don’t think it will be an easy job. Besides I don’t think anyone at MS knows enough about security to write a virus. 
And yes that last sentence was a serious statement. Just look at their record so far!