The National Library of Technology digitised ten printed books and their binder’s volumes in 2017. The works were printed in the 18th century – mostly in Germany, but also in Poland and Switzerland; the earliest digitised printed book is a part of the work Elementa matheseos universae by Christian Wolff, printed in Geneva in 1735. Besides mathematics, also natural-science treatises as well as practical guides (astronomy, geometry, surveying, accounting, etc.) are represented.