You can easily upload any documents here (owner's manuals, evacuation plan, work schedules, etc.) that you want to have access to and be able to share with others within your organization. You can add these to equipment or within a work order. 

To add a document, go to Settings>Advanced>Document Library, upload your document (any file type with exception of .exe files) and SAVE

Once you've uploaded all of your documents, you can edit the name of the document or delete the document. You can also add any of your documents to a work order or piece of equipment.