Texas Instruments

• LCD-1985-1990

Model: TI-505
Battery: solar
Adapter: 
Year: 1985
Chip:     
Info: LCD  1985 - 1990 

• First HANDHELD printing

Model: TI-5050 M
Battery: 6 x AA ni-cd            
Adapter: AC9171
Year: 1976
Chip: TMS1115         
Info:  first HANDHELD printing

• LCD-1991-1999

Model: TI-508 plus
Battery: solar 
Adapter: 
Year: 1995
Chip: Sharp LI3154
Info: made in Thailand 

• Euro line

Model: TI-51 III
Battery: BP7
Adapter: AC9132
Year: 1979 Price: L.59.000 + iva 14%
Chip: TMC1502
Info:TI-51 III same as TI-55, but TI-55 was sold in the US while TI-51 III was sold in Europe. From an advertisement of the time! The most technical. Because it specializes in solving math problems (90 functions): from logarithms to trigonometry and complex statistical problems. Easy programmability (32 program steps, 10 memory registers) exponential notation. AOS (algebraic operating system). Polar/Rectangular conversions and unit conversions. It offers you the possibility to solve all your professional problems at the touch of a button. 

• LCD-1991-1999

Model: TI-510
Battery: LR54 / solar
Adapter: 
Year: 1980
Chip: Toshiba T9731BU
Info: