Seems like there are many options available that improve the accessibility of the TI-89 (and as a parent of a middle and a high-schooler I’ve been frustrated by

Seems like there are many options available that improve the accessibility of the TI-89 (and as a parent of a middle and a high-schooler I’ve been frustrated by this as much as the next parent): - You can go to eBay - Here’s a used listing at $29 [1] - You can go to Alibaba and purchase what is likely a knock-off at $20-$50 for a minimum order of 100 units (perhaps an arbitrage opportunity for an enterprising student? :) [2] I also came across an interesting article that calls into question the ability of TI to copyright the keyboard layout which cites Lotus v. Borland and Oracle v. Google decisions [3] [1] https://www.ebay.com/p/1800843141?thm=3000 https://www.ebay.com/p/1800843141?thm=3000 [2] https://www.alibaba.com/showroom/ti-89-calculator.html?searchweb=Y& https://www.alibaba.com/showroom/ti-89-calculator.html?searc... [3] https://www.vice.com/en_us/article/wnxeqb/one-reason-why-youre-still-paying-120-for-a-ti-89-calculator-copyright https://www.vice.com/en_us/article/wnxeqb/one-reason-why-you...