the crudest and most sophisticated forms of writing tools act as mediators of human written communication for the purpose of producing, distributing and conserving written language. In the modern world the computer is arguably the most sophisticated form of mediation, the implications of which are not yet fully understood. The use of computers (a writing artifact which mediates communication) for the production and editing of text is almost as old as computers themselves. Early computers involved the use of crude text editors and a writer had to insert commands resembling a programming language to format and print a document. For example to underline a word the writer had to do the following, This is an example of how to .ul underline a single word. in order to produce: This is an example of how to underline a single word.