Resources
Document library
Original notes, public-domain references, licensed resources, and external engineering documents. Personal notes, bookmarks, and markups remain user-specific.
How to use the document library
The document library is a curated workspace for engineering PDFs and notes that have a clear source status. Each document page includes public context, source type, category, and private reader features such as bookmarks and notes for signed-in users.
Use these documents for revision, comparison, and personal markup. Before relying on a file for project work, confirm the edition, source, units, formulas, and any licensing or project-specific restrictions.
A useful library page should make the document understandable before a visitor opens the file. The title, category, description, and source label are kept visible so students and working engineers can decide whether the item is a quick revision note, an original EnggTools reference, a public external source, or a private study aid that needs extra checking.
When a document has limited context, it is better treated as a supporting reference instead of a standalone design instruction. The surrounding page text is meant to keep that distinction clear and reduce the chance that a formula sheet, lecture note, or external document is used outside its intended scope.
Non-Traditional Machining Formula Sheet
A compact owner-provided formula sheet for non-traditional machining and production engineering reference.
production-engineering
Heat and Mass Transfer Short Notes
A compact heat and mass transfer short-notes PDF for private resource-library review, useful for quick revision of thermal engineering formulas and concepts.
heat-and-mass-transfer
Source awareness
Every public document should show whether it is original, licensed, public-domain, external, or private-note material.
Private study notes
Bookmarks and notes are tied to the signed-in user, so public documents stay unchanged while personal revision remains useful.
Engineering caution
PDF notes are review aids and must be checked against current standards, project documents, and qualified engineering judgment.