I'm not sure how they've worked it out, but Cisco has a registered trademark for IOS, which is their operating system for network equipment: http://www.cisco.co

I'm not sure how they've worked it out, but Cisco has a registered trademark for IOS, which is their operating system for network equipment: http://www.cisco.com/en/US/products/ps6537/products_ios_sub_category_home.html http://www.cisco.com/en/US/products/ps6537/products_ios_sub_...