First Programmable Calculator

"Introduced on January 19 1974, this was the fourth handheld electronic calculator sold by HP, and the third scientific model. "Superstar" was its code name, and the HP-65 lived up to this name; it was the first programmable model, which led to its being dubbed "the world's first handheld computer." Wlodek Mier-Jedrzejowicz.
Source: MoHPC - The Museum of HP Calculators

X-Number World