Maple workbooks can contain worksheets (.mw files) as a collection of documents. They can store variables via the savelib command, and those variables can be implicitly made available when setting libname to mention a workbook or directory containing a workbook. Variable storage in a workbook mirrors many of the features in a library archive (.mla file). Workbooks can also store file attachments of any kind. File attachments in a workbook can be referenced using standard maple commands for file import and manipulation via a URI.