The Educator® Intermediate

Date of introduction:  1997 Display technology:  LCD 
New price:  $85 Display size:  8
Size:  8.0" x 4.0" x 0.30"    
Weight:  4.8 ounces Serial No:  
Batteries:  n.a. Date of manufacture:  
AC-Adapter:   Origin of manufacture:  China
Precision:  12 Integrated circuits:  
Memories:  1    
Program steps:   Courtesy of:  Joerg Woerner

The California based company Stokes Publishing Company, Inc. distributes under the label "The Educator®" calculators optimized for teaching purposes. William T. Stokes filed already July 30, 1991 the US Patent Application U.S. Pat. No. 5,035,502 with the title "Transparent calculator for overhead projection".

Both the keyboard and the display are made from translucent glass and plastics. Using a simple overhead projector the teacher could demonstrate easily the function of a calculator. 

The successor of the original Intermediate emulates the Texas Instruments TI-12 Math Explorer with integer division, floating negative sign, fifteen levels of parentheses, fixed decimal capability, fraction to decimal conversion and vice versa, and true algebraic logic.

Overhead™ Calculator is a trademark of Stokes Publishing Company, Inc.
AOS™ is a trademark of Texas Instruments.


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© Joerg Woerner, March 5, 2004. No reprints without written permission.