The purpose of this article is to introduce and possibly awake your interest in such thing as a mnemonic. Mnemonic is any learning technique that aids memory. It has the set of methods and tricks that will help you memorize a lot of information in the proper sequence. For example, 100 random words (numbers) can be memorized consecutively with an interval in 6 seconds. Some people manage to remember a few thousand digits after pi. In addition it helps to learn a foreign language. You probably ask: "Why do we need this mnemonic?” I say: you can use it as a hobby to amaze your friends, as well you could improve your memory skills, participate in various competitions and much more, it offers endless possibilities. Therefore, I would like to introduce some most popular techniques (devices) that are used around the world.