<P> In Hawaii these levels are numbered I1, I2, I3, ...; "I" stands for "ilelo", basement . </P> <P> In malls, one may find half - height parking garages, in which the floors are named after the mall, but the floors that between the mall's floors may have suffixes like "A" or "M" added . For example, "1", "1A", "2", "2A", etc . The floors may be numbered as 1, 11⁄2, 2, 21⁄2, or "1", "1.5", "2", "2.5" etc . Elevators in half - height parking garages in malls usually stop only at the mall levels and not the parking levels between the mall levels . </P> <P> In split - level parking garages, the lower level may have the suffix "A" and the upper level have the suffix "B", like "1A", "1B", "2A", "2B", etc . Elevators in split - level parking garages normally stop at one of the two split levels or between the two split levels, and the levels in elevators may be named just "1", "2", etc . </P> <P> Elevator buttons may also be labelled according to their main function . In English - speaking countries, besides the common L for "Lobby", one may find P for "Pool" or "Parking" (and P1, P2, P3, P4, P5, P6, P7, P8, P9, P10, etc. for multiple parking floors), S for "Skyway" or "Street", R for "Restaurant" or Roof, PH for "Penthouse", OD for "observation deck", W for Walkway, T for Tunnel, Ticketing or Trains, etc . In some US buildings, the label G on the elevator may stand for the building's "Garage", which need not be located on the "Ground" floor . </P>

How tall is a 10 story building in meters