Texas Instruments

• Classic 1 generation

Model: SR-11 
Battery: 3  x AA ni-cd
Adapter: AC9900
Year: 1974
Chip: TMS0602
Manual: with permission www.datamath.orgInfo: TIP line -  classic first GENERATION  

• Classic 1 generation

Model: SR-16
Battery: 3  x AA ni-cd
Adapter: AC9200
Year: 1975
Chip: TMC1001
Manual: with permission www.datamath.org
Info: TIP line -  classic first GENERATION 

• Classic 2 generation

Model: SR-16 II
Battery: 3 x AA
Adapter: AC8190
Year: 1975
Chip: TMC1016
Info: classic second GENERATION 

• Desktop line

Model: SR-20
Battery: 
Adapter: AC 110 volt
Year: 1973
Chip: TMS02020, TMS0304
Manual: with permission www.datamath.org   
Info: DESKTOP line 

• Desktop line

Model: SR-22
Battery:  no
Adapter: AC9222
Year: 1974
Chip: TMS0207, TMC0323, TMC0404   
Info: Look carefully at the display of the SR-22 and you'll notice immediately that this calculator could perform amazing calculations. It is the only calculator reported so far to perform Octal-Decimal-Hexadecimal conversions on the base of floating point numbers.