A PDF can carry other files inside it. Embedding keeps a document and its supporting data together as one object, so the spreadsheet behind a report cannot be separated from it in transit.
Generally yes, though some readers and mail systems block executables.
Yes, by roughly the size of the attachments.
PDF/A-3 permits them. Earlier profiles restrict or forbid them.
These tools handle one document at a time. When the job is thousands of files, Greenbooks handles document digitization as a managed service, including bulk scanning, OCR and metadata capture, with the output loaded into DocuVenta DMS. Talk to us about volume work.