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I have had a CASIO memory-8R for over 40 years. On all my fingers and toes I cannot count the number of calculators (battery and AC powered), cell phones and laptops that I have burned through, yet the 8R keeps on keepin' on. I use it every day, bulletproof technology from a time when quality was important. Today? Well, it's all about gaming, apps, social media, WI-FI hot spots, Snapchat, Twitter and the like. The downside of this calculator and all others is that there is a generation out there that can't work a basic math problem with a pencil and paper.