Short-term memory is the temporary ability to recall a few pieces of information (e.g., 7-10 pieces as in a telephone number) for seconds to minutes. (Tortora, Gerard J., and Sandra R. Grabowski. Principles of Anatomy and Physiology, 10th Edition. p 519. NY: John Wiley & Sons, Inc., 2003.)

Short-term or working memory is involved in all aspects of thinking and problem solving (e.g., read a menu and keep options in mind while listening to the specials). It accommodates one task at a time (e.g., a new task bumps out content of the old task). The average number of things you can keep active in working memory simultaneously is about seven. (LeDoux, Joseph. Synaptic Self, How Our Brains Become Who We Are. p 175-176. NY: Penguin Books, 2002.)