These MV-22s are to receive additional upgrades for communications and passenger comfort.

An additional upgrade was made in 1875 when the lamp was switched out for a four wick mineral oil burner.

The overhead catenary received additional upgrades, the first of which used primarily span wire support from the existing line poles.

Now, the typical home personal computer can hold several hours of standard-definition video, and is fast enough to edit footage without additional upgrades.

The first of these improvements were made in the 1930s with additional upgrades in the 1960s and 1970s.

All proceeds of this project will be used to pay for the benches and additional upgrades for the student lounge.

Every delivered lot is expected to have additional upgrades.

By 2015, additional upgrades are expected to increase the airport's capacity to 75 million passengers.

In 2008, ABB received the order for an additional upgrade.

The tender engines received an additional upgrade of moulded plastic 'coal'.