- Business Class (plane)
A section of the plane and set of ammenities conducive to getting work done.
I flew business class and fell asleep instead of working.
- Economy Class (plane)
The smallest passenger seats on the plane, usually the most affordable.
I cuddled up with the stranger next to me in economy.
- Premium Economy Class (plane)
An experience nicer than economy, but not as nice as business. Each airline has its own ideas.
Using a SIM card on a network that it isn't directly subscribed to.
My phone roamed into another country, now I've got a large bill to pay!
- SIM Card
The little piece of plastic that is inserted in to a mobile phone so it knows which network to connect to.