Japan Telecom Holdings trimmed its full-year revenue forecast by 10 percent.

Secondary market estimates put Zynga's 2010 full-year revenues at $850m.

Autonomy reported full-year revenues for 2010 of $870m, up 18% on the year before, and profit before tax of $379m, up from $323m in 2009.

"We expect full-year revenues to be substantially below analysts' projections," said Robert Polansky, the company's president and chief executive.

Price comparison website Moneysupermarket said it expects full-year revenues to rise 20pc after demand for its services remained strong throughout 2011.

Yahoo now expects full-year revenue, excluding traffic acquisition costs, of $2.455 billion to $2.535 billion.

When Windows 7 was released in 2009, it boosted full-year revenues in the consumer software division by $3.5bn to $18.5bn.

And full-year revenue under the new system would be restated to $63.1 billion for 1991 and to $62.2 billion for 1990.

The company reported full-year revenues of $11.5 billion, compared with $10.7 billion on a pro forma basis a year earlier.

The wireless telephone industry's full-year 1992 revenue was up more than 54 percent from $5.71 billion in 1991.