Texas Instruments

• galaxy line

Model: TI-65
Battery: 2 x LR44
Adapter: 
Year: 1988
Chip: CD4805 , CD4806               
Info:The TI-65 Technical Analyst is a quite interesting calculator within the Galaxy-line.

• galaxy line

Model: TI-66
Battery: 2 x LR44
Adapter: 
Year: 1984
Chip: Toshiba T6875, TC5514A               
Info: GALAXY line

• LCD-1985-1990

Model: TI-68
Battery:  CR2032
Adapter: 
Year: 1990
Chip: CPU: Toshiba T9948A   
Info: Taiwan

• LCD-1985-1990
• RCI

Model: TI-68 prototype
Battery:  CR2032
Adapter: 
Year: 1985
Chip: CPU: Toshiba T9948A   
Info: Calculator donated by Massa Gennaro in 2023 during the 2nd edition "the story with Texas Instruments" in Rieti, (World Chili Pepper Fair). This was a prototype with transparent case, built in the Rieti factory.

• graphing

Model: TI-73
Battery: 4 AAA + CR1620 
Adapter: 
Year: 1999
Chip: Zilog Z84C0008 
Info: GRAPHING