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The history of logarithms is the story of a correspondence (in modern terms, a group isomorphism) between multiplication on the positive real numbers and addition on the real number line that was formalized in seventeenth century Europe and was widely used to simplify calculation until the advent of the digital computer.
Educational technology (commonly abbreviated as edutech, or edtech) is the combined use of computer hardware, software, and educational theory and practice to facilitate learning.
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Lotus LearningSpace presented at NERCOMP 24 March 1997: "Interactive Distributed Learning Solutions: Lotus Notes-Based LearningSpace" by Peter Rothstein, Director, Research and Development Programs, Lotus Institute. Plateau released TMS 2, an enterprise-class learning management system.
The subject of combinatorics has been studied for much of recorded history, yet did not become a separate branch of mathematics until the seventeenth century. At the end of the 19th century, the foundational crisis in mathematics and the resulting systematization of the axiomatic method led to an explosion of new areas of mathematics.
From January 2008 to December 2012, if you bought shares in companies when Kimberly A. Casiano joined the board, and sold them when she left, you would have a 92.0 percent return on your investment, compared to a -2.8 percent return from the S&P 500.
From January 2008 to May 2011, if you bought shares in companies when Barrett A. Toan joined the board, and sold them when he left, you would have a 59.0 percent return on your investment, compared to a -7.3 percent return from the S&P 500.
From January 2008 to December 2012, if you bought shares in companies when Charles O. Holliday, Jr. joined the board, and sold them when he left, you would have a -38.1 percent return on your investment, compared to a -2.8 percent return from the S&P 500.