of this century, these forces] will coalesce into what unquestionably will become the greatest adventure of the human mind." RCA marketed a Spectra 70 computer line that was hardware, but not software, compatible with IBM's System/360 series. It also produced the RCA Series, which competed against the IBM System/370. This technology was leased to the English Electric company, which used it for their System 4 series, which were essentially RCA Spectra 70 clones. RCA's TSOS operating system was the first mainframe, demand paging, virtual memory operating system on the market. By 1971, despite a significant investment, RCA had only a 4% market share, and it was estimated that it would cost around $500 million over the next five years to remain competitive with the IBM/370 series. On September 17, 1971, the RCA Board of Directors announced its decision to close its computer systems division (RCA-CSD), which would be written off as a $490 million company loss. Sperry Rand's UNIVAC division took over the RCA computer division in January 1972. Later years On January 1, 1965, Robert Sarnoff succeeded his father as RCA's president, although the elder Sarnoff remained in control as chairman of the board. The younger Sarnoff sought to modernize RCA's image with the introduction in late 1968 of what was then a futuristic-looking new logo (the letters 'RCA' in block, modernized form), replacing the original lightning bolt logo, and the virtual retirement of both the Victor and Nipper/"His Master's Voice" trademarks. The RCA Victor Division was renamed RCA Records; 'Victor' was now restricted to the labels and album covers of RCA's regular popular record releases, while the "His Master's Voice" trademark was seen only on the album covers of Red Seal records. In 1969, the company name was officially changed from Radio Corporation of America to the RCA Corporation, to reflect its broader range of corporate activities and expansion into other countries. At the end of that same year, David Sarnoff, after being incapacitated by a long-term illness, was removed as the company's chairman of the board. He died in December, 1971. RCA's exit from the mainframe computer market in 1971 marked a milestone in its transition from electronics and technology toward Robert Sarnoff's goal to diversify RCA as a multinational business conglomerate. During the late 1960s and 1970s, the company made a wide-ranging series of acquisitions, including Hertz (rental cars), Banquet (frozen foods and TV dinners), Coronet