The introduction of Windows smartphones has been the big change under chief executive Stephen Elop, who phased out the Symbian operating system shortly after he took control of the company in 2010.

BBC: Nokia shares rise despite losses

Greater Manchester's tram network extensions have been delayed due to the fitting of a new operating system, the area's transport executive has said.

BBC: Metrolink Tram

The departures of the two senior figures have come as there have been questions over the leadership of chief executive Steve Ballmer and as the group's latest operating system Windows 8 has come under fire.

BBC: Amy Hood

Vertu had chosen Android over Windows as an operating system because it was more established, chief executive Perry Oosting told the BBC.

BBC: Vertu chooses Android over Windows for luxury handset

"Now consumers can easily add the specific content they want to their hard drives, and still rest easily knowing their entire operating system is protected, " commented Charlene Murphy, executive vice president of sales and marketing, Rebit Inc.

ENGADGET: Rebit announces SaveMe backup system for simplistic PC users

Cutting through all the talk about what will happen to its troubled Symbian operating system and future OS, Meego, new Chief Executive Stephen Elop said Nokia would streamline its development strategy for both, centering on a cross-platform framework called Qt.

FORBES: Elop Leads Nokia's Fight Back in Smartphone War, Wields Qt

"Sun is getting a proven enterprise-class directory built into the operating system - it's a strong direction, " says Gary Rowe, executive vice president of The Burton Group, which sponsored the Catalyst Conference.

CNN: Sun/Netscape Alliance brings directory ties

Microsoft watchers such as Michael Cherry at Directions on Microsoft, or competitors such as Red Hat Chief Executive JamesWhitehurstJames Whitehurst, blame the folks who sell the PCs built around Microsoft's new operating system.

FORBES: Magazine Article

But rather than fire back, Motorola co-Chief Executive Sanjay Jha told The Wall Street Journal that he would consider working with Microsoft's revamped mobile operating system.

WSJ: Motorola Sues Apple Over Patents