Sony's decision to exit the PC business means that after 17 years in the industry, the Vaio brand will probably disappear from western retailers before the end of 2014. As the PC market has contracted over the past two years, from a peak of 361m in 2011 to 315m last year, it has become harder for smaller players to make a profit. Calculations based on financial results suggest that the average selling price of a PC made by the "big five" fell from $614 at the start of 2010 to $544 (£332) in the autumn of 2013.

Ranjit Atwal, devices analyst at research firm Gartner, says there is a shakeout coming. The PC market is dominated by five big companies – China's Lenovo, the American HP and Dell firms, and Taiwan's Acer and Asus. Together they ship 60% of the PCs sold globally a year. Apple has just over 5% of the market. That leaves about a third of the market for the smaller players, and far less of the profits.

Profits per PC for those big five companies, though, have dropped from $15.71, or 2.6% of the selling price, to $14.87. That is not evenly spread: Asus is the most profitable, while Acer reportedly has made an operating loss for the past three quarters. And those five are the companies that build at real scale, shipping between 5m and 15m units every quarter. Atwal ranks Toshiba, Samsung, Sony, and Fujitsu as the "bottom four" – together they had about 12% of the market last year – and as those most under pressure.

"Sony will not be the last to say goodbye to PC hardware," says Ben Bajarin, an analyst with Creative Strategies, in California. "Those who survive will reap the rewards."

Twitter has 241 million monthly active users(MAU) now which is an increase of nearly 30 percent year on year and 184 million monthly active mobile users. Twitter announced the milestone in its financial results for the fourth quarter.

After appearing on various benchmark websites and recently on a French magazine's website as well, Nokia X a.k.a Normandy has reportedly been certified in Indonesia and Malaysia.

Microsoft Corp. today announced that its Board of Directors has appointed Satya Nadella as Chief Executive Officer and member of the Board of Directors effective immediately. Nadella previously held the position of Executive Vice President of Microsoft’s Cloud and Enterprise group.

Since joining the company in 1992, Nadella has spearheaded major strategy and technical shifts across the company’s portfolio of products and services, most notably the company’s move to the cloud and the development of one of the largest cloud infrastructures in the world supporting Bing, Xbox, Office and other services. During his tenure overseeing Microsoft’s Server and Tools Business, the division outperformed the market and took share from competitors.

Microsoft also announced that Bill Gates, previously Chairman of the Board of Directors, will assume a new role on the Board as Founder and Technology Advisor, and will devote more time to the company, supporting Nadella in shaping technology and product direction. John Thompson, lead independent director for the Board of Directors, will assume the role of Chairman of the Board of Directors and remain an independent director on the Board. 

“Satya is clearly the best person to lead Microsoft, and he has the unanimous support of our Board,” Thompson said. “The Board took the thoughtful approach that our shareholders, customers, partners and employees expected and deserved.” Founded in 1975, Microsoft (Nasdaq “MSFT”) is the worldwide leader in software, services and solutions that help people and businesses realize their full potential.

Google has launched five mini games for its Google Glass to inspire developers to create more games. These new games are Balance, Clay Shooter, a Fruit Ninja clone, Tennis and Matcher. Balance uses your head to shift around and stop a pile of shapes from toppling over. Clay Shooter lets the user say 'Pull' and move their head to the clay pigeon in the air to shoot it. Shape Splitter lets you slice shapes in mid-air by moving your hands in front of the Glass eyewear and Matcher is a traditional card-matching game. Tennis lets the wearer use their head as a racket and can play left or right by tilting their heads.

A Google blog post stated that the games can be played by using the device's voice activation features, an inbuilt gyroscope and accelerometer sensors. “Each game is visually simple and straightforward to play,” said Google.

The new mini-games are definitely not the first games built specifically for the device. Some of the games released earlier include BrickSimple’s multiplayer Battleship-like game dubbed ‘GlassBattle’ and AMA’s puzzle game called ‘Escape’.

Facebook has been long rumoured to expand its improved search feature, also known as Graph Search, to mobile platforms. And now Facebook has finally started testing out Graph Search on mobile devices, with select users.

Mashable reporter Seth Fiegerman, first spotted the change and posted the screenshot of the new interface – which heavily resembled to web version of Graph Search.

"We're really early in the game on [Graph Search]. You can see that because we haven't even really rolled out our mobile version of Graph Search yet and we're a mobile company. Pretty soon, you should expect us to roll out the mobile version of this. I think that's going to be an important step because most of the usage of Facebook overall is on mobile,” he said.

Rolling out Graph Search to mobile devices will help Facebook more precisely analyse the things its users are interested, and help determine what's hot on the social network. From users' perspective, finding things on the social network will get much easier and help engage in more activities on the network.