HP 10s Scientific Calculator This scientific solar calculator is perfect for mathematics and science courses. Simple-to-use and designed to go with you as your challenges grow, the HP 10s takes on the toughest problems. Designed expressly for math and science students of all levels, the HP simple-to-use 10s Scientific Calculator runs on a standard battery or on solar power. It"s also a handy tool for home-improvement projects and balancing the budget at home.