An old cash register

Imagine if modern supermarkets still used cash registers like this one. Imagine how slow the queue would be and long you'd have to wait while dozens of items in large shopping trolleys are rung up by the careful moving of sliders.

We have it much simpler these days, but still, perhaps some day we'll look back at the days of having cashiers ring up event item and think how incredibly inconvenient and time-consuming the process was. :)