Microsoft and Google have become embroiled in a bitter dispute over who is the fairest of them all for online shopping.
The 2012 US presidential election campaign is being fought with tweets, hashtags, Facebook updates and emails in a battle for digital supremacy.
Apple's victory in a landmark US patent case against Samsung could reshape the mobile sector and slow the momentum of Google and its Android system.
The public knowledge website is more than a decade old and remains among the top 10 Internet sites in the world, but some say it is becoming dowdy.
The US is seeing a natural gas boom thanks to discoveries of abundant shale gas, and at the same time a groundswell of opposition from critics.
Citigroup unveiled plans on Monday to repay $20-billion in government aid and outlined a plan to emerge from a massive bailout.
The recession in the United States "is very likely over" but its economy remains weak, Federal Reserve chairperson Ben Bernanke says.
A summit seeking a new economic agenda for the US kicks off on Monday, with debate among leaders aiming to find ways to maintain leadership.
A growing number of banks are eyeing quick repayment of US government capital injections after "stress tests" showed major lenders are healthy.
United States car makers mulled painful reforms on Saturday after President George Bush unveiled a $13,4-billion rescue loan for the industry.