Revenue passenger miles. Revenue passenger miles (or RPM) measures demand for air transport. Itâs calculated as the number of revenue passengers multiplied by the total distance traveled. Itâs also called airline âtraffic.â. An increase in RPM is positive for an airline company. It means that more passengers are using their service.
Definition. An armpit lump is a swelling or bump under the arm. A lump in the armpit can have many causes. These include swollen lymph nodes, infections, or cysts.
There could be various causes for a sore bump forming under your arm with the most frequent cause being an infection in the arm, breast, or armpit. Causes that could lead to a lump include infections, autoimmune diseases, cancers, and non-infectious disorders.