In UK/Ireland biscuits are a national treasure. Readily available, cheap, flippin' delicious, varied, suitable for dipping in tea, and sweet.
Here in the USA, those things are called cookies. They're ... different. It's not possible to go into a normal supermarket and buy a packet of e.g. hob nobs, or something like that. Cookies are ... well, they're lovely, but they're differnet. They have chocolate chips in them. They come in a bag. Or a see-through box.
In the USA, though, *biscuits* look a bit like mashed potato. And they're savoury. And made with flour. I have yet to try them, but I intend to the next time I see them on a menu.