Texas Instruments

• Desktop line

Model: TI-450
Battery: 
Adapter: 120 vac
Year: 1974
Chip: TMS0203, TMC0322
Info:

• First lcd and Slimline lcd

Model: TI-50
Battery: 2 x LR44
Adapter: 
Year: 1979
Chip:  TPO321
Info:  first LCD and slimline LCD   

• Desktop line

Model: TI-500
Battery: 
Adapter: 120 vac
Year: 1974
Chip:TMS0203, TMS0221, TMC0305
Info: This rare TI-500 was introduced in the year 1974 and seems to be a sibling of the TI-450 and TI-620.The TI-500 is based on the TMS0200 Chipset for 12-digit desktop calculators but misses the usual 12-digit display. Related calculators using this chip set are the SR-20 and SR-22. The first usage of the TMS0200 Building Blocks were the TI-4000 and the Canon 121F. The architecture found in this TI-500 differs greatly from these calculators, it uses the  Data Chip TMS0203, ROM Chip TMC0305, adding the Printer Chip TMS0221 to control the drum printer.

• Later HANDHELD printing

Model: TI-5000 microprinter
Battery: 4 x AAA                       
Adapter: AC9175
Year: 1982
Chip: Toshiba T676         
Info:  later HANDHELD printing

• Later HANDHELD printing

Model: TI-5006 II
Battery: 4 x AA                  
Adapter: 
Year: 1994
Chip: Toshiba T7916S
Info:  later HANDHELD printing