DATAMATH PICTURES

The original TI-1500 uses a keyboard layout with the [%] key on the left of the [0] key.	The second version of the TI-1500 corrected this flaw and uses a more convenient layout.	The third version of the TI-1500 kept the layout but changed the readability of the display.
The first version of the TI-1500 makes use of 9 discrete LED-modules and a magnifier lense glued on top of them.	The second version of the TI-1500 with the Opto-stick display manufactured by Bowmar - actually a competitor of TI.	The final version of the TI-1500 with a standard LED-stick manufactured by TI and a nice shaped bubble-lense stripe.