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Use Cases
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Resources
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Pricing
December 8, 1980
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1983
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1987
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1989
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November 1989
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1990
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1991
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January 1991
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1992
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1994
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1995
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1996
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1997
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1998
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2000
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2000
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September 11, 2001
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2002
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2002
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2004
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2005
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2006
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May 24 2006
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2009
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January 20, 2009
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