The issue focused on 'Free Space Redundancy' (aka 'Free Space') as an advantage in Free Software (free software for users and businesses). This issue also discussed other methods of operating systems that did not require direct calls to the OS's hardware; these included commercial operating systems (such as Microsoft Windows and UNIX), commercial operating systems (such as Linux), or Mac OS X. It also discussed how both Windows and UNIX use free software for those features that do not require direct calls to the OS