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.
Sometimes lumps in the armpit are not swollen lymph nodes but cysts or abscesses under the skin. These may be caused by shaving or the use of antiperspirants (not deodorants). Other causes of armpit lumps may include lipomas (harmless fatty growths) and certain medicines or vaccinations.