Edited by Robert J. Lang, Mark Bolitho and Zhong You with a committee of 14 other expertsOrigami7 is a collection of papers published for the 7th International Meeting on Origami in Science, Mathematics and Education (7OSME), held at Oxford University in the United Kingdom from September 4–7, 2018. 7OSME is the seventh conference in a series dedicated to research in the applications of origami and folding in the conference title fields, as well as in technology, design and history. Volume 4: Engineering TwoWith a preface by Zhong YouPapers on engineering. Papers published include research into diverse folding applications and products, adding strength to defensive shields, reinforcing tube strength, development of space sails, and the applications of folding processes to robotics. Some papers also explore the mechanical properties of the Miura fold, curved folding, and tessellations.