the J stands for Jumper as in Air Force Pararescue Jumper. The term Pararescue Jumper is a retronym of the initials 'PJ' that were used on an Air Force Form 5 (Aircrew Flight Log) to identify anyone who is onboard in order to jump from the aircraft..Source(s): http://en.wikipedia.org/wiki/United_Stat...he J stands for Jumper as in Air Force Pararescue Jumper. The term Pararescue Jumper is a retronym of the initials 'PJ' that were used on an Air Force Form 5 (Aircrew Flight Log) to identify anyone who is onboard in order to jump from the aircraft..
Virologists are microbiologists who study microorganisms that quickly duplicate, resulting in the rapid spreading of viruses. Their primary work is to figure out how diseases like AIDS, SARS and hepatitis spread, in order to prevent more rampant development and to assist in vaccine development.
What is a Cardiologist? A cardiologist is a medical doctor who specializes in treating problems of the heart, arteries, and veins, collectively known as the cardiovascular system. Conditions that may require the attention of a cardiologist include shortness of breath, chest pains (angina), and dizzy spells. Cardiologists also treat patients with heart disease, heart murmurs (arrhythmia), and victims of heart attacks or heart failure. They typically make decisions about when to perform heart-related procedures such as angioplasty, heart surgery, and heart transplants.