More Oracle databases run on Solaris than on any other operating system, Mr Ellison notes.

ECONOMIST: Computing

"It is a bit ironic, but the fact that Apple currently has such a small market share versus Microsoft 's Windows means that there are far fewer hackers writing virus code for the Macintosh operating system, " says Pile, who notes the premium IT managers place on system reliability.

FORBES: Apple's New Core

Many firms are working to use Linux behind software, such as Lotus Notes, that has traditionally run on Microsoft's Windows operating system.

BBC: The Sopranos, AP