DATAMATH PICTURES

The printed circuit board (PCB) of the Galaxy 10 looks familiar to us. Please notice the unfamiliar coding of the single-chip calculator circuit.
The printed circuit board (PCB) of the Galaxy Junior is identical. The only difference is the missing resistor to select the "TI-10" or "Junior" software in the calculator chip.
The IC of the Galaxy 10 with the unusual 1110484-0002 part number.	An identical part number was found in the early production Galaxy Junior.	Later Galaxy Junior with the more common CD4816 designation.
The internal construction of this late TI-30 Galaxy manufactured in Italy is identical with the Galaxy 10 shown above. The calculator circuit is a CD4808.