 The nemonic device, or memory device, has any learning technique that aids information retention or retrieval remembering in the human memory. Nemonics make use of elaborative encoding, retrieval cues, and imagery of specific tools to encode any given information in a way that allows for efficient storage and retrieval. Nemonics aid original information in becoming associated with something more accessible or meaningful which, in turn, provides better retention of the information. Commonly encountered nemonics are often used for lists and in auditory form, such as short poems, acronyms, or memorable phrases, but nemonics can also be used for other types of information and in visual or kinesthetic forms. Their use is based on the observation that the human mind more easily remembers spatial, personal, surprising, physical, sexual, humorous, or otherwise relatable information, rather than more abstract or impersonal forms of information. The word needmonic is derived from the ancient Greek word needmonicles meaning of memory, or relating to memory and is related to nemonic remembrance. The name of the goddess of memory in Greek mythology. Both of these words are derived from nemonic remembrance, the memory. Nemonics in antiquity were most often considered in the context of what is today known as the art of memory. Ancient Greeks and Romans distinguished between two types of memory, the natural memory and the artificial memory. The former is inborn, and is the one that everyone uses instinctively. The latter in contrast has to be trained and developed through the learning and practice of a variety of nemonic techniques. Nemonic systems are techniques or strategies consciously used to improve memory. They help use information already stored in long-term memory to make memorization an easier task.