Using the Canadian postal code system as an example, the top level's binding concept is the postal district, and consists of 18 objects (letters). The next level down is the zone, where the objects are the digits 0â9. This is an example of an overlapping hierarchy, because each of these 10 objects has 18 parents.
The refreshed 2014 Buick Regal GS can now be had with all-wheel drive, though the added grip does come at the expense of a few horsepower. We already sampled the 2014 Regal GS and walked away mostly impressed, but now itâs time to verify how the sedanâs powertrain changes affect its performance numbers.
Since the discontinuation of Saturn in 2009, GM has positioned Buick to be an analogue to its German Opel brand, sharing models and development. Buick-branded vehicles are sold in the United States, Canada, Mexico, China and Taiwan. Buick sold 1,170,115 vehicles worldwide in calendar year 2014, a record for the brand.