Dear Colleagues
In this issue we present you five papers of different character, from authors from England, Slovenia and Bosnia and Herzegovina.
Two of them are papers from the 5th Conference "MAINTENANCE 2018" held on 9 and 10 May 2018 in Zenica. The report provides information on the held "MAINTENANCE 2018" assemblies and the "Fuel from Waste" Conference held on 27 June in Zenica.
On the front page was presented a laboratory of the Faculty of Mechanical Engineering in Zenica, and on the back cover a successful business system in the metal complex area.
We expect your contribution to the development of profession and science to your benefit, the benefit of our country and the world

Your editor in chief
Prof. emeritus dr. Safet Brdarević