| Field | Office Productivitly |
| Went Obsolete | 1954 |
| Made Obsolete By | NCR Paper, photocopiers, computer printers |
| Knowledge Assumed | None |
| When useful | Making copies of what you are writing on the spot without NCR Paper |
Put a blank paper down, then a sheet of Carbon paper with the sticky side down, and then the document you are writing on. Fill out the info, remove and discard carbon paper. Use a razor blade to carefully scrape off errors, and ink in corrections by hand.