Texas Instruments

• LCD-1980-1984

Model: TI-21
Battery: 2 x AA
Adapter: 
Year: 1982
Chip:     
Info: Taiwan

• LCD-1980-1984

Model: TI-2200 checkwriter
Battery: LR43
Adapter: 
Year: 1984
Chip:  NEC uPD1833
Info: The TI-2200 Checkwriter keeps the balance of three different accounts. The idea behind this calculator traces back to the TI-1880 Checkwriter.

• LCD-1985-1990

Model: TI-2200 II checker
Battery: LR43
Adapter: 
Year: 1987
Chip:     
Info: LCD  1985 - 1990 

• First lcd and Slimline lcd

Model: TI-25
Battery: 2 x LR44
Adapter: 
Year: 1978
Chip:  T3763  Toshiba
Info:  first LCD and slimline LCD 

• Datamath
• Rare
• TI-2500
• Audio Guide
• donated

TI-2500 V0 (white) datamath

Audio Guide

Model: TI-2500 V0 (white) datamath
Battery: 6 x AA ni-cd internal
Adapter: AC9100
Year: 1972 S/N: D0000 - 00599
Chip: TMS0110
Info: The famous TI-2500 Datamath calculator was first announced in April 1972 with a suggested retail price (SRP) of $149.95. Beginning June 1972 first customers received in the Neiman-Marcus and Sanger-Harris department stores in Dallas, TX their calculators before the formally introduction on September 21, 1972.

Special thanks to Alexandru Balasa for the donation