mount system, which was the E-mount. There were quite a few NEX models out there, when Sony decided to melt the NEX series into the Alpha series. The first Alpha MILC was the α3000, which was introduced in August 2013. It was followed by the Full-Frame α7 and α7R in October, then the successors of the NEX-5, the NEX-6 and NEX-7, the α5000 and the α6000 in 2014. The α6000 became the most popular MILC ever and Sony became the largest MILC manufacturer. Computing Sony produced computers (MSX home computers and NEWS workstations) during the 1980s. The company withdrew from the computer business around 1990. Sony entered again into the global computer market under the new VAIO brand, began in 1996. Short for "Video Audio Integrated Operation", the line was the first computer brand to highlight visual-audio features. Sony faced considerable controversy when some of its laptop batteries exploded and caught fire in 2006, resulting in the largest computer-related recall to that point in history. In a bid to join the tablet computer market, the company launched its Sony Tablet line of Android tablets in 2011. Since 2012, Sony's Android products have been marketed under the Xperia brand used for its smartphones. On 4 February 2014, Sony announced that it would sell its VAIO PC business due to poor sales and Japanese company Japan Industrial Partners (JIP) will purchase the VAIO brand, with the deal finalized by the end of March 2014. As of 2018, Sony maintained a 5% stake in the new, independent company. Healthcare and biotechnology Sony has targeted medical, healthcare and biotechnology business as a growth sector in the future. The company acquired iCyt Mission Technology, Inc. (renamed Sony Biotechnology Inc. in 2012), a manufacturer of flow cytometers, in 2010 and Micronics, Inc., a developer of microfluidics-based diagnostic tools, in 2011. In 2012, Sony announced that it would acquire all shares of So-net Entertainment Corporation, the largest shareholder of M3, Inc., an operator of portal sites (m3.com, MR-kun, MDLinx and MEDI:GATE) for healthcare professionals. On 28 September 2012, Olympus and Sony announced that the two companies will establish a joint venture to develop new surgical endoscopes with 4K resolution (or higher) and 3D capability. Sony Olympus Medical Solutions Inc. (Sony 51%, Olympus 49%) was established on 16 April 2013. On 28 February 2014, Sony, M3 and Illumina established a joint venture called P5, Inc. to provide a