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Sony's push into the medical devices business with the acquisition of a 15% stake in Olympus. Sony will provide a badly needed Y50 billion capital injection for Olympus. Olympus has a 70% share in the market for endoscopes.

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Sony CEO Hirai describes his plans for Sony in the next three years.

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After lifting of a decade long ban on the console Sony plans to build sales volume for the Playstation 4 in China.

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RIM reports selling 6 million smartphones in the 1st quarter of 2013, including 1 million Z10 smartphones. RIM says its Blackberry subscriber base dropped to about 76 million from 79 million the prior quarter. RIM reports earnings of $98 million, revenue declined to $2.68 billion from $4.18 billion the prior year quarter. The company's cash position at $2.9 billion was the same as the prior quarter.

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After suffering losses in the television market Japanese electronic manufacturers, Panasonic, Sharp and Sony, have diversified into solar energy, electric car batteries, and medical devices.

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The impact on Sony's image of a decade of missed opportunities. The failure to come up with innovative products early and maintain its leadership position. The emergence of Apple and Samsung as leaders in electronics that has hurt Sony's profitability. The failure to integrate the work of different divisions to produce exciting new products.

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Nokia's new hardware design strategy capitalizes on Nokia's strengths in design and manufacturing. Marko Ahtisarri, Nokia's head designer sees opportunity in coming up with phones that have more natural forms, and move away from the black, grey metallic rounded-corner rectangles. He wants to design a phone that would let users keep their heads up, so they can have contact with their environment even as they use their phones.

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The difficulties increase for Nokia with decrease in sales in emerging markets as it competes with new models from Huawei at the low end. The launch of the Lumia 900 runs into a software glitch and Nokia offers customers buying the phone from AT&T a $100 rebate until April 21- making the phone free on a two year contract. Nokia's global market share declined from 31% in 2010 to 23% in 2011, according to Gartner Inc. Nokia's dominance in India and the Middle East markets is slipping as low end smart phones with the Android operating system software are replacing Nokia phones. The result is that core mobile phone operations show a 3% negative operating margin in the first quarter, with the outlook for further declining margins in the second quarter of 2012. The Lumia 900 which has Microsoft software has fewer apps than the established Android and iPhone models creating more headwinds for the new smartphone. On April 11, 2012 Nokia shares lost 16% of their value and were down to $4.24.

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Blackberry employees reached a peak of over 17,000 in 2011 as the company continued to hire through 2009-2011. It was about 8000 in 2008 the first year of the financial crisis and recession and doubled in 3 years. The employee count is at 12,700 in 2013. The company was hit hard by the introduction of smartphones by Samsung and Apple. Blackberry now plans huge cuts of about 40% by the end of 2013. This shows how quickly the winds can change in the tech business field where disruptions for existing technology are the norm. A niche in the corporate business field was not sufficient to keep Blackberry from shrinking rapidly as businesses shifted to the new smartphone technology from rivals. Failure to anticipate new technologies can lead to irreversible losses. Blackberry shows the way down can be just as fast as the way up and a lost year or a wrong decision can be the difference between success and irreversible failure.

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Manjoo says Mayer's failure at Yahoo comes from making small moves but not acting as a transformational CEO by changing Yahoo's business. He says three years later apart from small acquisitions such as Tumblr Yahoo's business was the same as before. By Nov. 2015 the Board and investors appeared to be saying that Mayer had run out of time to make the changes needed to preserve Yahoo's U.S. internet business.

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Sony's Xperia Z smartphone as a competitor to Samsung Galaxy and Apple iPhone in 2013. Sony is now in third place in global smartphone sales with a 5% market share. Sony CEO Hirai says the basic building blocks are in place for Sony to secure the strong position in smartphone sales that its technology and assets deserve.

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The WSJ's Yun-Hee Kim's interview with J.K. Shin, CEO of Samsung Mobile in March 2013, at the time of the launch of the Galaxy IV smartphone.

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Blackberry RIM discards a plan to go private. CEO Thorstein is to leave the company and Fairfax Financial Holdings led investor shareholder group will invest $1 billion in the company. Fairfax owns 10% of Blackberry. After the news was announced the RIM Blackberry share price dropped 16% to $6.49. John Chen, former CEO of enterprise software company Sybase is the interim CEO. At its current cash burn rate, even with the $1 billion infusion Blackberry would run out of cash by the end of 2014.

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Yahoo CEO Marissa Mayer launched a series of acquisitions after becoming CEO in 2012. Tumblr was acquired for $1 billion. Yahoo has disclosed in a regulatory filing that it plans to write down the entire value of that acquisition. A number of other acquisitions have also failed to deliver value as Yahoo struggles in ad revenues- mobile ad revenues for Yahoo in the 1st quarter of 2016 were $250 million compared to $4.5 billion or 17 times that for Facebook. Yahoo has 200 million visitors each month, but its display ads are not strong on mobile and its mobile apps have not done well with users. As advertising shifted to mobile Yahoo stumbled badly. The failed acquisitions investment could have been better utilized in retaining talented mobile engineers, but Yahoo's CEO resorted to cost cutting when the strategy of looking at consumer trends for news content through digital magazine investments failed. As a result Yahoo suffered from slumping morale and a brain drain.