Apple's research and development expenses grew 33 percent year-over-year in the March quarter, or about $278 million, according to a filing with the US Securities and Exchange Commission found by AppleInsider. Overall spending for the first half of Apple's fiscal 2013 was up over $530 million, representing a 33 percent increase over the first half of 2012. Should Apple maintain higher spending, it could surpass $4 billion in R&D expenses by the end of FY2013.
