When I was asked to wander around to look for internet infrastructure, one of the first things I came across was the Metro card refill station, where I had to refill my metro card with my credit card. In these stations that are located in almost every subway station across the city, uses the EMV chip of the credit card to make transactions. Therefore, the machine needs to remain online to send a cryptogram to the card provider, who authorizes and authenticates the card or denies the transaction according to the bank account information of the user.
One other pretty large thing I noticed was the billboard that is located (for aesthetic purposes) at Times Square (but in reality, everywhere). These large LEDs are connected and wired to the internet. Even if they could not be hacked, their images are programmed online and then set. The picture below is one of the billboards I saw in Times Square.
Another device that can be connected to the internet is the thermostat. Below is a picture of our dorm thermostat. Some smart thermostats can be controlled with apps and are therefore connected to the internet as a device. Our model is, sadly, not a smart thermostat, but there were talks amongst the RAs and building administrators to connect it to our phones since our current thermostat keeps on malfunctioning.
