Sport utility vehicle body and tall interior packaging, a high seating position and center of gravity, and available all-wheel drive for off-road capability. Some SUVs include the towing capacity of a pickup truck with the passenger-carrying space of a minivan or large sedan. The traditional truck-based SUV is more and more being supplanted by unitary body SUVs and crossovers based on regular automobile platforms for lighter weight and better fuel efficiency. In some countries, notably the United States, SUVs are "not" classified as cars, but as "light trucks". SUVs overtook lower medium segment cars to become the world's largest automotive segment in 2015,
Initial operating capability system have received it and have the ability to employ and maintain it. The specifics for any particular system IOC are defined in that system’s Capability Development Document (CDD) and Capability Production Document (CPD)." The date at which IOC is achieved often defines the in-service date (ISD) for an associated system. Declaration of an initial operating capability may imply that the capability will be developed in the future, for example by modifications or adjustments to improve the system's performance, deployment of greater numbers of systems (perhaps of different types), or testing and training that permit wider application of the capability.