system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: How come when you insert a credit card chip, some make you remove the card rapidly and some make you leave it inserted?
gpt
If you’re being asked to keep the card inserted, it’s chip based transaction. 

You can’t ‘swipe’ your card’s chip. 

So if you’re being asked to remove the card rapidly, it’s actually just getting you to “swipe” your card’s magnetic strip at the back of your card. 

They’re two very different types of machines - one being significantly older and dated.