The specification called for folding wings, bomb gear, a gun and radio.

This was intended to increase endurance from four to five hours; the specification called for 4.5 hours.

The specification called for a cruise speed on 230 mph, and a weight of no more than 25,000 lb.

The specifications called for a central portion of 107 feet by 50 feet.

The specifications called for the design to be "as plain as possible, without ornament".

But they test it, and it is what the specification calls for.

Although the agency's own specifications call for no gases to reach the O rings, officials have said they believe the problem can be fixed.

The specifications call for what is likely to resemble a sophisticated automated teller machine.

The specification also called for the aircraft to operate from short, unprepared airstrips.

One of the designers has stayed at 80 but the specifications call for stepbacks if the design is higher.