Calculators in Beijing and Las Vegas

I shot this photo in a Carrefour in Beijing and was particularly amazed by the range of choice and the quantity offered. Something strange for an occidental, no ?

Some months after, in Las Vegas, during International Consumer Electronic Show, Sharp  presented one of the ancestor of calculators, the EL-805. The model exhibited, amongst the top notch technology devices, was the first calculator ever, pocket sized with LCD (Liquid Crystal Display). It has been released in 1973. I liked very much the nice (and useful ?) strap that emphasizes the pocket size innovation...