Texas Instruments

• First lcd and Slimline lcd

Model: TI-38
Battery: 2 x LR44
Adapter: 
Year: 1981
Chip:  TPO326
Info:  first LCD and slimline LCD     

• Slanted LCD

Model: TI-40
Battery: 2 x LR44
Adapter: 
Year: 1983
Chip:  CD4507
Info:  slanted LCD  generation

• Desktop line

Model: TI-4000
Battery:                
Adapter:  110 volt 
Year: 1974
Chip: TMS0201,TMS0301 
Info:  DESKTOP line  

• LCD-1991-1999
• RCI
• donated

Model: TI-40x galaxy
Battery: CR2032
Adapter: 
Year: 1993 ( RCI 15 93 )
Chip: Toshiba T6A59 
Info: Thanks to my friend Paolo Maistrello who sent me this calculator donated by Giovanni Flammini.

 ( RCI 15 93 )  built in the Rieti plant, 15th week of 1993.

• Euro line

Model: TI-41
Battery: 9 volt
Adapter: 
Year: 1977
Chip: TMC0982
Info: EURO line