Pain in the upper abdomen can often be attributed to temporary problems such as indigestion or gas. Persistent or severe upper abdominal pain may be related to other digestive tract conditions or to conditions of the body wall, blood vessels, kidneys, heart, or lungs.
Impersonation is the ability of a thread to execute in a security context that is different from the context of the process that owns the thread. Impersonation is designed to meet the security requirements of client/server applications.
Self-checking account where a fixed balance is maintained by regular replenishments and used for paying small, routine operating expenses. Also called Imprest account, Imprest fund, petty cash account, or petty cash fund,. http://www.businessdictionary.com/definition/imprest-amount.html.