Texas Instruments

• Basic

Model: TI-1050
Battery: 9 volt
Adapter: 
Year: 1977
Chip: TMC0921
Info: 

• First solar lcd and Slimline lcd

Model: TI-1070
Battery: 2 x LR43
Adapter: 
Year: 1979
Chip: TP0314         
Info: slimline LCD - first solar LCD  Made in Italy

• First solar lcd and Slimline lcd

Model: TI-1071
Battery: 2 x LR43
Adapter: 
Year: 1979
Chip: TP0314         
Info: slimline LCD - first solar LCD  Made in Spain   

• LCD-1985-1990

Model: TI-108
Battery: solar
Adapter: 
Year: 1988
Chip:     
Info: LCD  1985 - 1990  Made in Taiwan

• Overhead

Model: TI-108 overhead
Battery: 
Adapter: 
Year:  
Chip: made in China
Info:  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".