Texas Instruments

• slanted LCD

Model: TI-55 III
Battery: 2 x LR44
Adapter: 
Year: 1986
Chip:  CD4555,CD4556
Info:  slanted LCD  generation

• slanted LCD

Model: TI-56
Battery: 2 x LR44
Adapter: 
Year: 1985
Chip:  CD4555,CD4556
Info:  slanted LCD  generation

• slanted LCD

Model: TI-57 lcd
Battery: 2 x LR44
Adapter: 
Year: 1984
Chip:  CD4555,CD4572
Info:  slanted LCD  generation

• majestic line

Model: TI-57 programmable
Battery: BP6 , BP7
Adapter: AC9131 , AC9132
Year: 1980 Price: L.55.000 + iva 14 %
Chip: TMC1501          
Info: From an advertisement of the time! The most versatile. Because it is specialized it has 50 compact program steps. Thus it is a real programmable one which, maintaining at the same time the characteristics of a scientific one, lends itself to solving many problems with extreme flexibility. 8 addressable memories, SOA (algebraic operating system), 9 levels of parentheses, 10 labels, 2 levels of subroutines, 4 decision functions, 2 loop control functions. This is why it is the best-selling scientific-programmable in the world!

• TI 58 / 59 series

Model: TI-58
Battery: BP1 A
Adapter: AC9131 or DC9105
Year: 1977
Chip: TMC0501E TMC0582 TMC0583 TMC0571 2x TMC0598
Info: TI-58 / 59 programmable