ATMs are part of networks, which means that the banks share some ownership of their vital business function of giving me money and taking my deposits.
Mechanics
This category doesn’t apply.
Space/Time
Money is available at places other than banks, and at any time of the day or night (at least in the United States). This provides incredible convenience that’s extremely popular.
Concepts
I opened my bank account over the Internet; I get my money from ATMs; I deposit checks by mail. I’ve never even been to my bank’s building, which I think is in Canada somewhere. I now realize that banks aren’t big building with guards and vaults; they’re a collection of business functions.