Texas Instruments

• Desktop line

Model: TI-5200 beige
Battery:                
Adapter:  AC/DC 220 volt -12 volt  
Year: 1978
Chip: TMC1278 
Info:  DESKTOP line 

• Desktop line

Model: TI-5200 brown
Battery:                
Adapter:  AC/DC 220 volt -12 volt  
Year: 1978
Chip: TMC1278 
Info:  DESKTOP line 

• Desktop line

Model: TI-5220
Battery:      
Adapter:  110 or 220 volt     
Year: 1977
Chip: TMS1309, TMS1372
Info:  DESKTOP line 

• First lcd and Slimline lcd

Model: TI-53
Battery: 2 x LR44
Adapter: 
Year: 1982
Chip:  TPO323
Info:  first LCD and slimline LCD

• Slanted LCD
• RCI
• donated

Model: TI-53 slanted
Battery: 2 x LR44
Adapter: 
Year: 1985 ( RCI 17 85 )
Chip:  TPO323
Info: Calculator donated by Ludovisi Giancarlo in 2023 during the 2nd edition "the story with Texas Instruments" in Rieti, (World Chili Pepper Fair).