In the recent years the new ternary carbides or nitrides materials with the formula of Mn+1AXn where M is a transition metal, A is an element from group IIIA or IVA, X is either Carbon or Nitrogen, and (n=1-3) have been given more attention due to their unusual set of mechanical and physical properties. In this manuscript types, properties and some very new applications of these so called MAX phases in bulk and thin films forms have been reviewed. Some experimental results are also given. This research may shed light on these materials to be candidates for many potential applications.