Texas Instruments TI-10 Galaxy

Date of introduction:  1988 Display technology:  LCD
New price:   Display size:  8 (5 + 2)
Size:  3.5" x 6.0" x 0.65"
 88 x 153 x 17 mm3
Weight:  4.2 ounces, 119 grams Serial No:  
Batteries:  2*LR44 Date of manufacture:  week 09 year 1988
AC-Adapter:   Origin of manufacture:  Italy
Precision:   Integrated circuits:  CD4816
Memories:  1    
Program steps:   Courtesy of:  Joerg Woerner
    Download manual:   (FR: 7.6 MByte)

Texas Instruments introduced with the TI-10 Galaxy in France a simple calculator performing fractional arithmetic. You can use two different modes:

Euklid's division: 56 / 5 = 11 (Q)  1 (R)
Fractional division: 56 / 5 = 11_1/5

With the SIMP and F-D-key you can shorten results and convert between fractional and decimal display:

35/70 SIMP 1/2  F-D 0.5

Galaxy10_PCB.jpg (105597 Byte)Dismantling the Galaxy 10 reveals an internal construction identical with the TI-30 Galaxy and at first glance unknown calculator chip.

Galaxy10_IC.jpg (17297 Byte)Comparing the calculator chip with the almost identical Galaxy Junior sold in German leads to the CD4816.

If you compare the Galaxy 10 with the Galaxy Junior, focus on the keys in the upper left corner of the keyboard. 

The same difference could be found between the Galaxy 9 - Galaxy 9x and Galaxy 40 - Galaxy 40x siblings. A similar calculator using a traditional housing could be found with the Math Explorer.

Don't miss the innovative Casio AL-8 calculators introduced in 1975 and already operating and displaying fractions and the TI-Primaire Plus introduced in 2014.

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If you have additions to the above article please email:

Joerg Woerner, December 5, 2001. No reprints without written permission.