Texas Instruments

• LCD-1980-1984

Model: TI-1889 metric
Battery: 2 x LR1130
Adapter: 
Year:  1982
Chip: Toshiba T6751 
Info:  Made in Japan. Compared with the basic calculators manufactured in Taiwan early in the Eighties, the "TI-1889 Metric Converter" feels more substantial.

• First lcd and Slimline lcd

Model: TI-1890 converter
Battery: 2 x LR44
Adapter: 
Year: 1983
Chip:  CD4559
Info:  first LCD and slimline LCD  

• LCD-1985-1990

Model: TI-1895 II
Battery: solar
Adapter: 
Year: 1989
Chip: 
Info: Made in Taiwan

• First lcd and Slimline lcd

Model: TI-20
Battery: 2 x LR44
Adapter: 
Year: 1980
Chip:  TPO326
Info:  first LCD and slimline LCD

• First lcd and Slimline lcd

Model: TI-2001 gti France
Battery: 2 x AA
Adapter: 
Year: 1982
Chip: TP0455/CD4514 or TP0456/CD4564
Info: Blackhousing . Made in Italy