Checker Cabs were best known for their yellow livery, the black-and-white checkerboard-pattern stripes that ran down their sides, and their roomy interiors, which in addition to the usual back seat, included small collapsible seats immediately behind the front seats to accomodate extra passengers.
Today, many taxi companies in the United States and Canada operate under the name "Checker Cabs," although they may have no historical affiliation with the original company, and most likely do not have any Checker Cabs (per se) in their fleet.