Texas Instruments

• Graphing

Model: TI-81
Battery: 4 AAA + CR1620 
Adapter: 
Year: 1993
Chip: T6A43toshiba
Info: GRAPHING

• Graphing

Model: TI-82 1995
Battery: 4 AAA + CR1620 
Adapter: 
Year: 1995
Chip: CPU: Toshiba T84C00A  ASIC: Toshiba TC14L010  ROM: MX J9533©1995 RAM: SRM20256  Display: Toshiba T6A04
Info: GRAPHING

• Graphing

Model: TI-82 parcus
Battery: 4 AAA + CR1620 
Adapter: 
Year: 1994
Chip: TCPU: Toshiba T6C79  ROM: TA1782©2000  RAM: HY62WT081  Display: Toshiba T6A04A84C00  
Info:

• Graphing

Model: TI-83
Battery: 4 AAA + CR1620  
Adapter: 
Year: 1996
Chip: T6C79  toshiba
Info:From a users point of view the TI-83 is compatible with the TI-82 but added some financial functions and the "official" support of assembly programming. A smart decision, the TI-83 developed itself as a popular programming platform and prepared the tremendous success of the TI-83 Plus.

 Wikipedia TI-83 series

• Graphing

Model: TI-83 plus
Battery: 4 AAA + CR1620  
Adapter: 
Year: 1999
Chip: CPU: Zilog Z84C0008  ASIC: TI REF 9815455 Flash: AM29F400 RAM: SRM2B256 Display: Toshiba T6A04
Info:The TI-83 Plus added Flash technology to the TI-83 Graphing calculator. This technology gives you the flexibility to add calculator software applications and additional functionality beyond math and science, providing long-term value. 

 Wikipedia TI-83 series