btw. Win8 calc got a loading splash screen as &quot;feature&quot;. <a href="http:&#x2F;&#x2F;betanews.com&#x2F;2013&#x2F;10&#x2F;28&#x2F;windows-8-1s-calculator-app-sums-up-whats-wrong-with-microsofts-new-os&#x2F;" rel="nofollow">http:&#x2F;&#x2F;betanews.com&#x2F;2013&#x2F;10&#x2F;28&#x2F;windows-8-1s-calculator-app-s...</a><p>The Win10 calc app still takes a second or two to start up: <a href="https:&#x2F;&#x2F;www.reddit.com&#x2F;r&#x2F;windows&#x2F;comments&#x2F;3ng3f4&#x2F;windows_10_calculator_is_one_hell_of_a_step_down&#x2F;" rel="nofollow">https:&#x2F;&#x2F;www.reddit.com&#x2F;r&#x2F;windows&#x2F;comments&#x2F;3ng3f4&#x2F;windows_10_...</a><p>The old Win7 calc can still be downloaded from the Win10 store:  <a href="http:&#x2F;&#x2F;www.thewindowsclub.com&#x2F;use-new-windows-10-calculator" rel="nofollow">http:&#x2F;&#x2F;www.thewindowsclub.com&#x2F;use-new-windows-10-calculator</a><p>I always keep an old Derive 6 around, it&#x27;s still be best CAS and it&#x27;s syntax compatible with the good old TI 89&#x2F;92+&#x2F;Voyage calculator devices. screenshot: <a href="https:&#x2F;&#x2F;upload.wikimedia.org&#x2F;wikipedia&#x2F;sl&#x2F;9&#x2F;9f&#x2F;Derive_zaslonska_slika.png" rel="nofollow">https:&#x2F;&#x2F;upload.wikimedia.org&#x2F;wikipedia&#x2F;sl&#x2F;9&#x2F;9f&#x2F;Derive_zaslon...</a><p>And the old WinXP PowerToy Calc is still good too: <a href="http:&#x2F;&#x2F;dan.hersam.com&#x2F;2010&#x2F;11&#x2F;10&#x2F;powercalc-in-windows-7&#x2F;" rel="nofollow">http:&#x2F;&#x2F;dan.hersam.com&#x2F;2010&#x2F;11&#x2F;10&#x2F;powercalc-in-windows-7&#x2F;</a>