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  The Abacus: The World's First Computing System: Where It Comes From, How It Works, and How to Use It to Perform Mathermatical Feat  
St. Martin's Griffin | Jesse Dilson | ¿ø¼­ | 2007-09-04  
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The world's first computing system, the abacus was an ingenious invention designed to perform speedy calculations through the movement of beads on a series of rods. The new edition of D...
  Ti-89 Graphing Calculator for Dummies  
For Dummies | C. C. Edwards | ¿ø¼­ | 2005-08-01  
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Get up to speed easily with your TI-89 Titanium Use advanced science and math applications, PDA functions, and more Your TI-89 Titanium graphing calculator is an amazing tool, and thi...
  Ten-Key Skill Builder for Calculators  
South Western Educational Publishing | William R., Jr. Pasewark | ¿ø¼­ | 1999-08-06  
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This concise, easy-to-use text-workbook is designed to build speed and accuracy skills on the ten key pad using the touch method. Contains strokes-a-minute (SAM) and errors-a-minute (EA...
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