TI Museum

• LCD-1991-1999

Model: Eur-2001
Battery:  LR54
Adapter:     
Year: 1999
Chip: 
Info:The €-2001 calculator combines the usual basic calculator functions with a very convenient Euro currency conversion. All of the 11 yet defined exchange rates are preprogrammed in the calculator, 4 additional ones could be added later. The home country is selected with the Select-key. Two additional keys allow the conversion in both directions. A similar calculator using a desktop housing was introduced with the €-1796 and the €-2003.A simpler calculator was sold with the €-2000. Searching calculators in Europe without the Euro-conversion was difficult in 1999, one example is the TI-1726.In 2006 Texas Instruments surprised customers in Europe with a complete new family of Euro Calculators labeled EC-3, EC-5 and EC-7 Pro.

• LCD-1985-1990

Model: FIA-10 Financial Investment Analyst
Battery: 2 x CR2032
Adapter: 
Year: 1989
Chip: TMC70035, LH5821, TC5518, TC54256
Info: 

• LCD-1991-1999

Model: Fun Calc
Battery: Solar
Adapter: 
Year: 1994
Chip:   
Info:The Fun Calc is based on the TI-7140 introduced already in 1994, too.

• Galaxy line

Model: Galaxy 9
Battery: CR2032
Adapter: 
Year: 1999
Chip: Toshiba T6A60               
Info: GALAXY line

• Schoenherr
• Handy Tech
• Braillotron

Model: Galixa Speech
Battery: 4 AA-size NiCd
Adapter: 9V 100mA DC
Year: 2000
Chip: HD64180, M272001, U6264
 Galaxy 40x: Toshiba T6A59
Info: Made in Germany 

This Galixa Speech is a scientific calculator with natural voice speech output. Numerical data on the display panel can be spoken digit by digit or as a complete number. It speaks all key functions: e.g. when the [SIN] key is pressed the calculator says "Sine"; these announcements can be repeated. It also has a built-in clock and alarm function. The volume can be adjusted using a knob.

The language of the Galixa Speech could be choosen between: German, English, French, Italian, Dutch, Spanish,Swedish, Swabian German

EHG Handy Tech Elektronik GmbH introduced the first scientific calculator with voice output and 10-cell Braille display with the Galixa Braille. The first calculator with an upgradeable Braille cell output was the Braillotron TI-2550 II developed by Mr. Schoenherr.

• Majestic line

Model: Goulds Pumpulator
Battery: 9 volt o
Adapter: AC9132
Year: 1980
Chip: TMC0980 (CD9801)         
Info: MAJESTIC line 
Manual: with permission www.datamath.org

• Overhead

Model: Intermediate plus overhead
Battery: 
Adapter: 
Year: 
Chip:  made in China
Info:  The California based company Stokes Publishing Company, Inc. distributes under the label "The Educator®"
calculators optimized for teaching purposes. William T. Stokes filed already July 30, 1991 the US Patent Application U.S. Pat. No. 5,035,502
 with the title "Transparent calculator for overhead projection".

• Jeppesen line

Model: Jeppesen Avstar 1980
Battery: 2 x LR44
Adapter: 
Year: 1980
Chip:  TPO328
Info: JEPPESSEN  line   

• Jeppesen line

Model: Jeppesen Avstar 1986
Battery: 2 x LR44
Adapter: 
Year: 1986
Chip:  TPO328
Info: JEPPESSEN  line

• Jeppesen line

Model: Jeppesen Prostar
Battery: 2 x LR44
Adapter: 
Year: 1983
Chip:  CD4575 - CD4576
Info: JEPPESEN  line 

• LCD-1985-1990

Model: Number Beat
Battery: LR43
Adapter: 
Year: 1987
Chip:     
Info:

• Basic

Model: Spirit of 76
Battery: 9 volt
Adapter: 
Year: 1972
Chip: TMC0952
Info:

• Classic 1 generation

Model: SR-10 Italy
Battery: 3  x AA ni-cd
Adapter: AC9900
Year: 1973
Chip: TMS0120  
Info: TIP line -  classic first GENERATION  the logo is inside the display 

• Classic 1 generation
• Rare

Model: SR 10 Italy
Battery: 3  x AA ni-cd
Adapter: AC9900
Year: 1973
Chip: TMS0120  
Info: This Calculator has 4 upper keys BLUE prototype or Fake ?

• Classic 1 generation

Model: SR-10 vers. 2
Battery: 3  x AA ni-cd
Adapter: AC9900
Year: 1973
Chip: TMS0120
Manual: with permission www.datamath.org
Info: TIP line -  classic first GENERATION  

• 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.

• Majestic line

Model: SR-40
Battery: BP 5
Adapter: AC9132
Year: 1976
Chip: TMC0981
Manual: with permission www.datamath.org           
Info: MAJESTIC line 

• Majestic line
• Rare
• TI-30

Model: SR-40 LCD
Battery: 2 x AA
Adapter: NO
Year: 1981
Chip: TP0320
Manual:            
Info:The extremely rare SR-40 LCD (1981) calculator produced in Brazil is an interesting model, as at first glance it looks very similar to the European version of the TI-30 LCD. However, a few differences set it apart. One of the most noticeable differences concerns the keys: while the European TI-30 LCD features the **N!** (factorial) key, the Brazilian SR-40 LCD has the **x!** key, a detail that might reflect slight variations in functionality or target use. Another notable difference is the design of the battery compartment. The SR-40 LCD uses two AA batteries, but the compartment cover requires a coin to be opened, unlike the sliding cover of the European TI-30 LCD. This feature probably represents an adaptation for greater durability or security in battery replacement. These small variations between the models highlight production differences between different markets, making the SR-40 LCD a particularly rare and interesting piece for vintage calculator collectors.

Many Thnaks to DATAMATH.ORG

• Classic 1 generation

Model: SR-50
Battery: BP 1
Adapter: AC9200
Year: 1974
Chip: TMC0501 / 0521
Manual: with permission www.datamath.org
Info: TIP line -  classic first GENERATION 

• Classic 2 generation

Model: SR-50 A
Battery: BP 1 A
Adapter: AC9130
Year: 1976
Chip: TMC0501 - TMC0503
Manual: with permission www.datamath.org      
Info: classic second GENERATION 

• Classic 1 generation
• Rare
• Dismac

Model: SR-50 Dismac
Battery: BP 1
Adapter: AC9200
Year: 1974
Chip: TMC0501 / 0521
Manual:
Info: Fellow calculator collector Marie Lisa Collas surprised us in December 2015 with this unusual looking SR-50manufactured for Dismac Industrial S.A. in Brazil. Texas Instruments changed the appearance of the original dramatically by simply switching the silver colored aluminum bezel from the display frame to the keyboard. Purchased in 2022.  

• Classic 1 generation

Model: SR-51 1v
Display: 10 + 2
Battery: BP 1 
Adapter: AC9200
Year: 1975
Chip: TMC0501, TMS0522, TMC0523
Manual:              
Info:With the SR-51 Texas Instruments began a series of scientific calculators that added statistical functions and conversions to the "usual functions". But none of them are engineered as flawlessly as the SR-51. It was built as a tank to survive decades of use like its close relative SR-50. Compared to previous models, the SR-51 got a keyboard design with white, gray, yellow and orange keys and gave a perspective to later TI calculators. To reduce manufacturing costs and to give a similar look and feel to the SR-52 and SR-56 calculators, the SR-51 was replaced within months with the SR-51A. Logically it is quite rare. However, two different variants are known: this model from an early production batch uses huge yellow characters for the 2 shifted functions, while the later SR-51 sports much finer print.

This rare model had many parts corroded by battery acid, the 7-segment displays completely corroded, the replacement and cleaning of the keyboard can be seen on the side.

• Classic 2 generation

Model: SR-51 2v
Battery: BP 1 
Adapter: AC9200
Year: 1975
Chip: TMC0501, TMS0522, TMC0523
Manual: with permission www.datamath.org             
Info:

• Classic 2 generation

Model: SR-51 A
Battery: BP 1 
Adapter: AC9130
Year: 1976
Chip: TMC0501 / 522 / 523             
Info: classic second GENERATION

• Classic 2 generation

Model: SR-51 A
Battery: BP 1 
Adapter: AC9130
Year: 1976
Chip: TMC0501 / 522 / 523             
Info:This calculator has the 4 keys for BLUE operations is it a prototype or a fake?

• Majestic line

Model: SR-51 II
Battery: BP 6
Adapter: AC9131
Year: 1977
Chip: TMC0501 / 581
Manual: with permission www.datamath.org           
Info: MAJESTIC line 

• Classic 2 generation

Model: SR-52
Battery: 3 x AA
Adapter: AC9130A or DC9105
Year: 1975
Chip: TMC0501 / 0524 /0595 / 2xTMC0599, 2xTMC0561/0562
Manual: with permission www.datamath.org  basic library         
Info: classic second GENERATION 

• Classic 2 generation
• Rare
• Prototype

Model: SR-52 clear case
Battery: 3 x AA
Adapter: AC9130A 
Year: 1976
Chip: TMC0501, TMS0537, TMC0538, TMC0599           
Info: This SR-52 Clear-Clase Prototype was most likely manufactured in November 1974 and is a strange hybrid sporting.

• Classic 2 generation
• pc-100

Model: SR-56
Battery: 3 x AA
Adapter: AC9130A 
Year: 1976
Chip: TMC0501, TMS0537, TMC0538, TMC0599
Manual: with permission www.datamath.org           
Info: classic second GENERATION 

• Desktop line
• Rare
• video

Model: SR-60 
Battery: NO 
Adapter: AC 110 volt or AC 220 volt
Year: 1976
Chip: TMC0501, TMC0526 or TMC0536, TMC0564, TMC0565, TMC0566, TMC0567, TMC0568 or TMC0570, TMC0596, 5*TMC0599, TMC0253, TMC0254
Info: Texas Instruments introduced in 1976 with the SR-60 their first high-end programmable desktop calculator. Priced at $1695 and with a footprint of roughly 17" by 14.5" (430 mm * 370 mm) the SR-60 resembled more a computer than a programmable calculator.

Based on the SR-52 and SR-56 series of programmable calculators, the SR-60 integrated a full-sized keyboard with 95 keys, a large alphanumeric display with 20 characters, a thermal dot-matrix printer with 20 characters and a magnetic card reader for saving and loading both programs and data.

One of the main advantages of the SR-60 is the huge memory for data and program, already the base model could hold 480 program steps and 40 memory registers. Two memory expansion modules were available, one implemented with just two small daughter boards holding 5 resp. 3 TMC0599 RAM chips accessible through a bottom panel in the housing. The second memory expansion, a huge printed circuit board (PCB) with a total of 27 TMC0599 RAM chips, was mounted below the keyboard next to the Main PCB.

The SR-60 operates using pure algebraic logic (e.g., problems are presented to the machine as they would be written on paper). The calculator adheres to the PEMDAS (Parenthesis, Exponentiation, Multiplication, Division, Addition, Subtraction) order of precedence. The [(] and [)] keys may be used to group expressions to override the PEMDAS rules as required. Parentheses can be nested up to ten levels deep. The machine calculates and displays results to ten significant digits, and always formats the display to provide maximum accuracy.

  with permission of the author www.datamath.org  

Claudio Larini. My interest in the world of information technology was born as soon as I finished high school, before leaving for the university adventure at the Polytechnic of Milan, after having purchased the first issue of a magazine, Micro and Personal Computer in September 1979. So after having consulted the "Market Guide", which was divided between Personal Computers, Programmable Calculators and Microprocessor Boards, and compatibly with the available budget I decided to purchase a programmable calculator.

SR-60 EMULATOR (and others ....) Claudio Larini ITALY 

TroubleShooting   

After finding the SR-60 and checking it, we realized that it wasn't working. We started with the power supply. This power supply provides all power for the individual PCBs, (-20, -15.8, -10, -5 and -19) with an input voltage ranging from -26.5 to -42. At this point we realized that the -15.8 voltage that powers the main PCB was not being supplied.

 As expected with these 50 year old objects, the filter capacitors, in this case 10uF, failed, one was shorted, another changed value.

Causing the breakage of three transistors in the power supply, the TIP30 replaced with one from the stock of components we have from the 70s and 80s, in addition to the A1872 replaced with a BC556 and an A2031 replaced with a BC547. We were unable to find the latter the same .

• Desktop line
• Rare

Model: SR-60 A
Battery: 
Adapter: AC 110 volt
Year: 1978
Chip:TMC0501, ...TMC0526, 5*TMC0599, TMC0253
Info: Texas Instruments introduced in 1976 with the SR-60 their first high-end programmable desktop calculator. Priced at $1695 and with a footprint of roughly 17" by 14.5" (430 mm * 370 mm) the SR-60 resembled more a computer than a programmable calculator. Based on the SR-52 and SR-56 series of programmable calculators, the SR-60 integrated a full-sized keyboard with 95 keys, a large alphanumeric display with 20 characters, a thermal dot-matrix printer with 20 characters and a magnetic card reader for saving and loading both programs and data. One of the main advantages of the SR-60 is the huge memory for data and program, already the base model could hold 480 program steps and 40 memory registers. Two memory expansion modules were available, one implemented with just two small daughter boards holding 5 resp. 3 TMC0599 RAM chips accessible through a bottom panel in the housing. The second memory expansion, a huge printed circuit board (PCB) with a total of 27 TMC0599 RAM chips, was mounted below the keyboard next to the Main PCB. A fully-optioned SR-60 could hold programs with a maximum of 5760 steps and 430 memory registers.

• Majestic line

Model: TI business analyst I LED
Battery: 9 volt or RK2
Adapter: AC9132
Year: 1981
Chip: TMC0982         
Info: MAJESTIC line 

• First lcd and Slimline lcd

Model: TI business analyst II lcd
Battery: 2 x LR44
Adapter: 
Year: 1980
Chip:  TPO322
Info:  first LCD and slimline LCD 

• Majestic line

Model: TI business analyst
Battery: BP5 , BP8
Adapter: AC9131 , AC9132
Year: 1978
Chip: TMC0982         
Info: MAJESTIC line 

• First lcd and Slimline lcd

Model: TI Investment Analyst 
Battery: 2 x LR44
Adapter: 
Year: 1980
Chip: TP0320 (CD3201)
Info:

• Majestic line

Model: TI money manger led
Battery: BP 7
Adapter: AC9132
Year: 1977
Chip: TMC0982         
Info: MAJESTIC line 

• Slanted LCD

Model: TI programmer II lcd
Battery: 2 x LR44
Adapter: 
Year: 1985
Chip:  TPO456/CD4569
Info:  If you take your time comparing this calculator with all other members of the second slanted series (BA-54, TI-57-II) you notice something very special. The keyboard position doesn't fit to the usual spacing. The ON/C-key is misplaced and one key is super-sized. You have to open the calculator to get the answer:  This is not the usual construction of a slanted calculator! A very small printed-circuit-board, actual the form factor of a modern slimline calculator like the BA-II, is fitted into the housing.

• Slanted LCD

Model: TI programmer lcd
Battery: 2 x LR44
Adapter: 
Year: 1983
Chip:  CD4569
Info:  slanted LCD  generation

• Majestic line

Model: TI programmer led
Battery: BP 8
Adapter: AC9132
Year: 1980
Chip: TMC0983         
Info: MAJESTIC line

• Majestic line

Model: TI the MBA
Battery: BP 7
Adapter: AC9132
Year: 1981
Chip: TMC1502         
Info: MAJESTIC line Made in USA

• LCD-1991-1999

Model: TI-0007 MathMate
Battery: solar
Adapter: 
Year: 1991
Chip:     
Info:

• LCD-2000-2017

Model: TI-10
Battery: solar, CR2025
Adapter: 
Year: 2002
Chip:
Info: modern LCD  2000 - 2017 

• Modern Desktop

Model: TI-10 europa
Battery:  solar
Adapter:     
Year: 1995
Chip: 
Info: modern DESKTOP 

• Overhead

Model: TI-10 overhead
Battery: 
Adapter: 
Year:  2006
Chip: made in China
Info:  The California based company Stokes Publishing Company, Inc. distributes under the label "The Educator®"
calculators optimized for teaching purposes. William T. Stokes filed already July 30, 1991 the US Patent Application U.S. Pat. No. 5,035,502
 with the title "Transparent calculator for overhead projection".

• Basic

Model: TI-1000 gold
Battery: 3 x AAA ni-cd
Adapter: AC9180
Year: 1977
Chip: TMC1991 or TMC1992
Info: 

• Basic

Model: TI-1000 silver
Battery: 3 x AAA ni-cd
Adapter: AC9180
Year: 1977
Chip: TMC1991 or TMC1992
Info: 

• First solar lcd and Slimline lcd

Model: TI-1001
Battery: 2 x LR43
Adapter: 
Year: 1982
Chip: TP0311         
Info: slimline LCD - first solar LCD     

• LCD-1980-1984

Model: TI-1002
Battery: 2 x LR1130
Adapter: 
Year: 1983
Chip:          
Info: made in Taiwan      

• LCD-1980-1984

Model: TI-1006
Battery: solar
Adapter: 
Year: 1983
Chip: T6789s Thoshiba      
Info: LCD  1980 - 1984  Made in Japan

• First solar lcd and Slimline lcd

Model: TI-1010
Battery: 2 x LR43
Adapter: 
Year: 1980
Chip: TP0311         
Info: slimline LCD - first solar LCD  

• LCD-1980-1984

Model: TI-1015 brown
Battery: 2 x AA
Adapter: 
Year: 1982
Chip: T3876Stoshiba     
Info: Made in Japan Brown version

• LCD-1980-1984

Model: TI-1015 cream
Battery: 2 x AA
Adapter: 
Year: 1982
Chip: T3876Stoshiba     
Info: Made in Japan

• LCD-1980-1984

Model: TI-1020 brown
Battery:  2 x AA
Adapter:     
Year: 1980
Chip: Sharp LI 3009
Info:We wrote the year 1980, when Texas Instruments discovered the lower labor costs of Taiwan, R.O.C. compared to US or Europe. Till the early 80s most calculators from Texas Instruments were produced either in US or Italy and some early LCD models like the TI-1768 even in Japan. Taiwan.

• LCD-1980-1984

Model: TI-1020 cream
Battery:  2 x AA
Adapter:     
Year: 1980
Chip: Sharp LI 3009
Info:We wrote the year 1980, when Texas Instruments discovered the lower labor costs of Taiwan, R.O.C. compared to US or Europe. Till the early 80s most calculators from Texas Instruments were produced either in US or Italy and some early LCD models like the TI-1768 even in Japan.  Made in Taiwan

• Basic
• TI-1025

Model: TI-1025
Battery: 9 volt
Adapter: 
Year: 1977
Chip: TMC0923
Info: 

• First solar lcd and Slimline lcd

Model: TI-1030
Battery: 2 x LR43
Adapter: 
Year: 1981
Chip: TP0311         
Info: slimline LCD - first solar LCD    

• First solar lcd and Slimline lcd

Model: TI-1031
Battery: 2 x LR43
Adapter: 
Year: 1981
Chip: TP0311         
Info: slimline LCD - first solar LCD    

• First solar lcd and Slimline lcd

Model: TI-1032
Battery: 2 x AA
Adapter: 
Year: 1982
Chip: TP0311         
Info: slimline LCD - first solar LCD

• First solar lcd and Slimline lcd

Model: TI-1032 BPR
Battery: 2 x AA
Adapter: 
Year: 1982
Chip: TP0311         
Info: This it was given to employees (Banca Popolare di Rieti) as a gift.

• First lcd and Yellow lcd

Model: TI-1035
Battery: 2 x LR44
Adapter: 
Year: 1979
Chip: Toshiba T3703          
Info:first TI-LCD - yellow LCD  

• LCD-1980-1984

Model: TI-1036
Battery: 2 x LR1130
Adapter: 
Year: 1986
Chip:
Info: LCD  1980 - 1984 

• First lcd and Slimline lcd

Model: TI-1040
Battery: 2 x LR43
Adapter: 
Year: 1980
Chip: TPO311
Info:

• Basic

Model: TI-1050
Battery: 9 volt
Adapter: 
Year: 1977
Chip: TMC0921
Info: 

• First solar lcd and Slimline lcd

Model: TI-1070
Battery: 2 x LR43
Adapter: 
Year: 1979
Chip: TP0314         
Info: slimline LCD - first solar LCD  Made in Italy

• First solar lcd and Slimline lcd

Model: TI-1071
Battery: 2 x LR43
Adapter: 
Year: 1979
Chip: TP0314         
Info: slimline LCD - first solar LCD  Made in Spain   

• LCD-1985-1990

Model: TI-108
Battery: solar
Adapter: 
Year: 1988
Chip:     
Info: LCD  1985 - 1990  Made in Taiwan

• Overhead

Model: TI-108 overhead
Battery: 
Adapter: 
Year:  
Chip: made in China
Info:  The California based company Stokes Publishing Company, Inc. distributes under the label "The Educator®"
calculators optimized for teaching purposes. William T. Stokes filed already July 30, 1991 the US Patent Application U.S. Pat. No. 5,035,502
 with the title "Transparent calculator for overhead projection".

• LCD-1980-1984

Model: TI-1100
Battery:  LR43       
Adapter: 
Year: 1990
Chip: Toshiba    
Info:    

• LCD-1982-1987

Model: TI-12 math explorer
Battery: solar
Adapter: 
Year: 1988
Chip:  T6m39s Toshiba
Info:  modern LCD  1982 - 1987

• LCD-1991-1999

Model: TI-12 math explorer
Battery: solar
Adapter: 
Year: 1998
Chip:  T6m39s Toshiba
Info:  China. The Math Explorer ( TI-12) is another calculator introduced by Texas Instruments to perform fractional arithmetic for elementary school. 

• Overhead

Model: TI-12 intermediate overhead
Battery: 
Adapter: 
Year:  
Chip: made in China
Info:  The California based company Stokes Publishing Company, Inc. distributes under the label "The Educator®"
calculators optimized for teaching purposes. William T. Stokes filed already July 30, 1991 the US Patent Application U.S. Pat. No. 5,035,502
 with the title "Transparent calculator for overhead projection".

• Basic

Model: TI-1200
Battery: 9 volt
Adapter: 
Year: 1975
Chip: TMS0952
Info: Introduced in March 1975, the TI-1200 started together with the TI-1250 a great career with millions and millions units manufactured over the course of about 2 years. As a successor to both the stylish TI-1500 and the Exactra line, the TI-1200 demonstrated already the impressive design and technical engineering behind the TI-30. 

• Basic
• TMS0972NL

Model: TI-1200 lady
Battery: 9 volt
Adapter: AC9180
Year: 1976
Chip: TMS0972
Info:

• Basic
• TMS0972NL
• donated

Model: TI-1205
Battery: 2 x AA ni-cd
Adapter: AC9130
Year: 1977
Chip: TMS0972
Info:Texas Instruments took in 1976 in conjunction with mathematics educators at two major universities an initiative to introduce a group of 6 calculators for educational use. Including the Little Professor, the limited function ABLE calculator, the colorful TI-1205 and TI-1255, the TI-30 and the sophisticated SR-51-II, these calculators helped students understand and use math concepts from kindergarten through college and career.The TI-1205 is based on the TI-1200 but includes rechargeable NiCd-batteries instead the standard 9V block battery. To enhance the readability of the keyboard both the size of the numerals and the color-scheme was improved.Disassembling the TI-1205 with Date code 1977 LTA and manufactured in May 1977 in Lubbock, Texas reveals an internal construction identical with the TI-1255. Instead of the 9V battery found in the original TI-1200/TI-1250 design, the TI-1205 makes use of 2 rechargeable, AA-sized NiCd (Nickel Cadmium) batteries. The printed circuit board (PCB) of the TI-1205 adds both the charging circuit for the batteries and a step-up converter to generate the 9V supply of the TMS0972 single-chip calculating circuit to the design known from the TI-1250. 

Donated from Marie Collas (FR)

• Basic
• True Value
• TMS0972NL

Model: TI-1220
Battery: 9 volt
Adapter: AC9180
Year: 1976
Chip: TMS0972
Info: custom model manufactured for True Value Harware Store

• Basic
• True Value
• TMS0972NL

Model: TI-1225
Battery: 9 volt
Adapter: AC9180
Year: 1976
Chip: TMS0972
Info: custom model manufactured for True Value Harware Store

• Basic
• TMS0972NL

Model: TI-1250
Battery: 9 volt
Adapter: AC9180
Year: 1976
Chip: TMC0952
Info: 

• Basic
• Rare
• TMS0972NL
• Missing

Model: TI-1255
Battery: 9 volt
Adapter: AC9130
Year: 1977
Chip: TMC0972
Info: property Marie Collas

• Basic

Model: TI-1260
Battery: 9 volt
Adapter: AC9180
Year: 1976
Chip: TMC0954
Info: 

• Basic

Model: TI-1265
Battery: 9 volt
Adapter: AC9180
Year: 1977
Chip: TMS1043
Info: 

• Basic

Model: TI-1270
Battery: 9 volt
Adapter: 
Year: 1976
Chip: TMC0974
Info:

• Basic
• Rare

Model: TI-1270 V0
Battery: 9 volt
Adapter: AC9180
Year: 1977
Chip: TMS0974 (7701) Year 77 Week 01 / ZA0355
Info: Discovery of a very early version of TI-1270 built in Rieti (RCI2177 Week 21 Year 1977), you can see the writing 1270 printed on the metal mask under the display.

• Basic
• TMS0972NL

Model: TI-1400
Battery: 9 volt
Adapter: AC9180
Year: 1976
Chip: TMS0972
Info: 

• Basic
• TMS0972NL

Model: TI-1450
Battery: 9 volt
Adapter: AC9180
Year: 1976
Chip: TMS0972
Info: 

Model: TI-15 explorer lcd
Battery: CR2025
Adapter: 
Year: 2007
Chip: China
Info:

• Euro line

Model: TI-15 lcd
Battery: 2 x AA alkaline
Adapter: 
Year: 1982
Chip: Taiwan
Info

• Euro line

Model: TI-15
Battery: 9 volt
Adapter: 
Year: 1981
Chip: TMC0981
Info: EURO line 

• Overhead

Model: TI-15 overhead
Battery: 
Adapter: 
Year:  
Chip: made in China
Info:  The California based company Stokes Publishing Company, Inc. distributes under the label "The Educator®"
calculators optimized for teaching purposes. William T. Stokes filed already July 30, 1991 the US Patent Application U.S. Pat. No. 5,035,502
 with the title "Transparent calculator for overhead projection".

• Basic
• Rare

Model: TI-150
Battery: 4 x AA ni-cd internal
Adapter: AC9150
Year: 1975
Chip: TMS0852
Info: This calculator tastes different, it was a dear friend Joerg of datamath.org who gave it to me.

Very Rare