A deliverable is an input/output term that refers specifically to the unique and individual products, elements, results, or items that are produced for delivery at the conclusion of a specific project component, or at the conclusion of the project as a whole. Deliverable can come in a number of different variations. Deliverable can be in the form of a written report, which can be extremely lengthy and can encompass extensive amounts of information and data. Deliverable can also be much shorter. In some cases, the end deliverable may be a short report, a slide presentation, a poster, a short blurb, or even a slogan. In these cases, the deliverable may actually be very short, and rather than containing all information gathered over the course of a project, may contain a succinct message that is meant to represent the sum total of the information without actually presenting it directly. Deliverable towards the end of a project life are typically referred to as external deliverable, and these typically require the review and/or approval of the customer or financially responsible party. See also, product, service, and result.