And they settled on a single plane type because they save money and make it much less likely that passengers sit around waiting for spare parts.

WHITEHOUSE: "Doing What Works" Transcript

Within a year Travelport hopes to give every single flight a carbon rating, taking into account the plane, the type of fuel used, and other data points.

BBC: smokestack in Beijing

Mr Clarke's solution: customers booking a flight should be told more than the ticket price and the type of plane used on a route.

BBC: smokestack in Beijing

Every item that is part of an airplane, down to its nuts and bolts, must be certified as safe before the FAA approves that type of plane as safe for flight.

NPR: NTSB Probes Safety Testing Of Boeing 787 Batteries

The plane's grounding on Jan. 16, an enormous black eye for Boeing, marked the first time since 1979 that FAA had ordered every plane of a particular type to stay out of the air for safety reasons.

NPR: FAA Approves Resumption Of Boeing 787 Flights

This High Definition 9.2 mm thin monitor features an IPS (In-Plane Switching) panel, a superior type of screen that offers consistent image appearance and colors across the entire display, even from extreme viewing angles.

ENGADGET: The AOC Aire Pro: a 23-inch IPS monitor for $199

This type of succession planning is akin to preparing for a plane trip.

FORBES: Vikram Pandit's Abrupt Exit: Was the Citigroup Board Just Doing Its Job?

This is a special type of Earth model which traces its idealised "horizontal" surface - the plane on which, at any point, the pull of gravity is perpendicular to it.

BBC: Europe's Goce satellite probes Earth's gravity

Red Bull sponsors some 500 athletes around the world, the type who will surf in Nova Scotia in January or jump out of a plane to "fly" across the English Channel.

FORBES: Magazine Article

He picks a plane, then goes through registries maintained by the Federal Aviation Administration to see how many of that type are still around and who owns them.

FORBES: Barnstormer