Texas Instruments

• Modern Desktop

Model: TI-1798
Battery:  solar
Adapter:     
Year: 1990
Chip: 
Info: modern DESKTOP made in taiwan

• LCD-1982-1987

Model: TI-18
Battery: 2 x LR43
Adapter: 
Year: 1983
Chip:  TPO311
Info:  modern LCD  1982 - 1987

• First solar lcd and Slimline lcd

Model: TI-1850 visor kit
Battery: 2 x LR43
Adapter: 
Year: 1981
Chip: TP0311         
Info: slimline LCD - first solar LCD

• 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.