Texas Instruments

• first lcd and slimline lcd

Model: TI-1880 CheckWriter
Battery: 2 x LR43
Adapter: 
Year:  1982
Chip: TPO0311 
Info:  The TI-1880 Checkwriter combines a wallet to hold the checks, balance book, cash, credit cards and a pen with a slimline calculator. The calculator is a standard TI-1001 with brown-silver colored housing. 

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