What tha heck is a comptometer?


Here is one of my rainy day posts.

 A few weeks ago, I had a enlightening discussion about calculator usage with one of my fellow mathematicians. She stated that we were actually considered software to the contraption to left. 

This image is identified as a comptometer. Being the nerd that I am, I though I knew of every vintage calculating machine that ever existed to man. However, I learned something new that day. You actually had to be a trained comptometrist to touch this machine; and if you were trained, you were in high demand due to its high learning curve.

My collegue, a trained comptometrist, demonstrated the arithmetic operation manuevers; which to me seems to require great manual dexterity to crunch numbers with speed this way. I recorded it and have it here to share with you. In regards to calculator technology, we have really come a long way. This would be great to share with students to see how easy they have it now and we should not take that calculating device for granted; or even let them do research on this device and other vintage calculators.




T.I.’s Hottness for 2009

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If you thought that I was going to talk about Clifford Joseph Harris Jr., I apologize in misleading you.

However, I just briefly wish to share what I saw at the Texas Instruments booth during NCTM09. The photos below seemed to be all that really caught my attention.

On the left, I got my hands on the new TI-73. This model was designed for the middle school. The updated version of this calc has an increased space for memory to load more apps – where the previous version did not allow. Also, it is officially now sexy like the TI-84s.

To the right, you have the Navigator system designed towards the TI-Nspire. As you can see, the wireless hubs are actually attached to the back of the calcs instead of having the calc hooked up to the wireless hubs. That data cable is gone! Click on the image for additional information and to find out when this system will be released.

T.I.’s theme apparently was “Math Rocks!” I had the opportunity to take a picture beside an autographed guitar signed by the Jonas Brothers. Woo hoo!


The New & Improved TI-73


Wireless TI-Nspire Navigator