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HP 35s
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<p>The HP 35s (F2215A) is a <a href="/facts/Hewlett-Packard/abuNSYNu">Hewlett-Packard</a> non-graphing <a href="/facts/Programmable_calculator/5UHx9nIg">programmable</a> scientific calculator. Although it is a successor to the <a href="/facts/HP_33s/tTLXVNTY">HP 33s</a>, it was introduced to commemorate the 35th anniversary of the <a href="/facts/HP-35/EKPVBVe1">HP-35</a>, Hewlett-Packard's first pocket calculator (and the world's first pocket <a href="/facts/Scientific_calculator/DSP1udIC">scientific calculator</a>). HP also released a limited production anniversary edition with shiny black overlay and engraving "Celebrating 35 years". </p>