claim: Ding Yanyuhang was born in the summer of 1993.
evidence: Andrew F. Kay -LRB- January 22 , 1919 -- August 28 , 2014 -RRB- was a businessman and innovator .. He was President and CEO of Kaypro , a personal computer company , which at one time was the world 's fourth largest manufacturer of computers , and the largest in the world in sales of portable computers .. Kaypro. Kaypro. Kay , a 1940 graduate of MIT , started his career with Bendix followed by two years at Jet Propulsion Laboratory .. MIT. MIT. Bendix. Bendix Corporation. Jet Propulsion Laboratory. Jet Propulsion Laboratory. In 1952 founded Non-Linear Systems , a manufacturer of digital instrumentation .. Non-Linear Systems. Non-Linear Systems. NLS developed a reputation for providing rugged durability in critical applications for everything from submarines to spacecraft .. At NLS he invented the digital voltmeter , in 1954 .. digital voltmeter. digital voltmeter. Kaypro began selling computers in the early 1980s ; in 1985 it had more than $ 120 million in revenues , dwarfing what had been its parent , NLS .. Kaypro. Kaypro. But the company 's success was relatively short ; in 1990 it filed for Chapter 11 bankruptcy protection , and it was liquidated in 1992 .. In the late 1990s , Kay founded Kay Computers , which similarly manufactured and sold personal computers .. The company lasted for less than ten years .. Kay later was a Senior Business Advisor to Accelerated Composites , LLC .. He co-founded the Rotary Club of Del Mar , California .. Rotary Club. Rotary Club