📠 Technologies of the past: the internet has recalled a 19th-century cash register that could give change in literally a second. The device, with its hundreds of buttons, automatically dispensed the required amount of coins with a single press. The cashier no longer had to manually count each coin—it was enough to select the correct combination.

Anti-ram metal barriers Wow wow wow!!! @WowFactory

Here's how air actually moves through your home Wow wow wow!!! @WowFactory