AAC is not one-size-fits-all. Hundreds of apps, speech-generating devices (dynamic and static), light-tech, and no-tech strategies, are available to help students unable to communicate effectively using their speech. Selecting an inappropriate system can lead to limited success or, in some cases, system abandonment. The National Joint Committee for the Communication of Persons with Severe Disabilities (NJC) states that "it is important that a clear picture of the individual's current capabilities and needs are considered in order to select communication devices, communication techniques, and the symbol systems or symbol sets."