Documents such as drawings, memos and specifications form an essential component of the design industry. From the conception to the completion of a project, hundreds of documents might be used. Each document forms a node in a complex web of data that conveys information from the germination of a design idea, right through to its final built form. In many ways, therefore, the success of a design- or construction-based practice relies upon an understanding of the use of documents, and the technologies and techniques that are used to create them.