in-box An in-box courier delivery is one where the courier consignment is left in a locked box to be collected later - usually by a service engineer. It's a bit like a left-luggage box, and you enter a number on a keypad to get into it.
in-car / in-boot This is like courier in-box, but the courier consignment is left in someone's car - usually on their driveway at night.
installation and swap-out Some couriers offer an installation and swap-out service for things like computers, printers, faxes, etc. It means they will deliver the new item, connect it up, and take away the old one. Some people also offer an assembly and installation service for things like flat pack furniture. See also technical courier.
ITT (invitation to tender) An ITT is like an RFP but is usually more formal. The customer lays out in detail what their requirements are, and what service levels they expect, and perhaps a budget. Courier companies respond to them with formal tenders to say how they would meet the customer's requirements for that specific courier service or services.
COURIER SERVICES GLOSSARY 
