Educational

• professional calculator

Model: TI-74 S
Battery: 4 x AAA
AC adapter:
Year: 1987
Chip:
Info: The ti-74 was produced in two models with the Basic on board called TI-74 basicalc and TI-74 S (special) where it used a preprogrammed module, intended for insurance, banks, etc ..

• graphing

Model: TI-89 Voyage 200
Battery: 4 x AAA + CR1616
AC adapter:
Year: 2002
Chip: CPU: MC68SEC000 ASIC: TI REF 200C040  Flash: LH28F320  RAM: 2* CY62128  Display: 3*T6B07, 2*T6B08
Info:

• first symbolic

Model: TI-92-plus
Battery: 4 x AA + CR2032
Adapter: 
Year: 1996
Chip:  CPU: MC68SEC000  ASIC: TI REF 200C040  Flash: LH28F160  RAM: 2*SRM20V100  Display: 3*T6B07, 2*T6B08C414181  
Info: first SYMBOLIC  

• professional calculator

Model: TI-95 procalc
Battery: 4 x AAA              
AC adapter:
Year: 1987                          
Chip:
Info: module statistic

• data bank

Model: TI-2700 mini data bank
Battery: 3 x LR43 + CR1220              
AC adapter:
Year: 1988 
Chip:Toshiba TC5518 
Info: