Acupuncture is done by putting very thin needles into your skin at certain points on your body. This is done to influence the energy flow. Sometimes heat, pressure, or mild electrical current is used along with needles.cupuncture is a form of Chinese medicine that has been practiced for centuries. It's based on the theory that energy, called chi (say chee), flows through and around your body along pathways called meridians.
Definition and Explanation: The first in first out (FIFO) method assumes that goods are used in the order in which they are purchased. In other words, it assumes that the first goods purchased are the first used (in manufacturing concerns) or the first goods sold (in the merchandising concerns).
In computer science, a stack or LIFO (last in, first out) is an abstract data type that serves as a collection of elements, with two principal operations: push, which adds an element to the collection, and pop, which removes the last element that was added.n example is top of stack, or  peek , which observes the top-most element without removing it from the stack. Since this can be done with a pop and a push with the same data, it is not essential. An underflow condition can occur in the stack top operation if the stack is empty, the same as pop.