I have absolutely nothing special to say about this calculator, except to say that it did its job.
They aren't collector items like my Walkman was. The things go for $15-20 on ebay. Maybe mine could fetch a nice price if it were mint, but this thing isn't anywhere near mint. I don't have the manual, I certainly don't have the original box, and mine is certainly well used. However, not a single number is worn off, which beats the pants off the calculators of today.
The calculator served me well in my engineering and math classes. It's not reverse polish notation, but I never learned that. We weren't required to buy that sort of calculator. A few folks were surprised that I never learned RPN, but given the absolute non-necessity of its use in my lifetime, I can't say that I missed out on anything.
The Ti-30 SLR is the spiritual descendedn of those bulky, loud clicking, digital calculators of the 70's.
As the display was LED, despite being very low powered, it was still nowhere near the low power of LCDs. By around 1980, the LED display was onl the decline as the LCD was thinner, used less power, and was cheapter to manufacture. It's the low power LCD that enabled the creation of the solar powered TI-30 SLR.
Alas, I failed out of engineering, which only made me happy. I would have had a far better time going to trade school and learning machining. The numbers didn't really get through my brain, but process and process improvement would have. I am much more of a tradesman than a professional.