Postal Exam 473 / 473E. Study Guide: Yes! This is the biggie â¦ the most popular Postal exam â¦ the one used to fill all over 90% of all Postal jobs, all entry-level Processing, Distribution, Delivery, and Retail positions. Listed below are the actual jobs filled from this exam: 1  PSE Sales, Service, and Distribution Associate.
Osteoarthritis, also known as degenerative arthritis degenerative joint disease, OA, or osteoarthrosis, is a form of arthritis caused by inflammation, breakdown, and the eventual loss of cartilage in the joints-the cartilage wears down over time.
Causes and Symptoms of Osteoarthritis. OA is caused by a breakdown in the cartilage that covers the joints. The protective tissue is damaged by age and repeated motion. This increases the friction as the bones of the joint rub against each other. It can also cause damage to the bone. The most common symptoms of OA are pain and stiffness. OA can occur in any joint. However, the most commonly affected joints are in the: 1  hands. 2  knees. 3  hips. 4  spine.