Experienced programmers know the many benefits of using descriptive identifiers, such as the names of variables and functions. Descriptive names make it easier for the original developer — and all who follow — to understand the intent of the code, and to make global changes with minimal risk. In Drupal, when creating a new content type, the site developer assigns a human-readable name (which may consist of alphanumeric characters and spaces) and a computer-readable name (which may consist of lowercase letters, numbers, and underscores).