Foto: "<a href="https://ccby.de/foto/hard-hat-notepad-rolls-of-drawings-on-a-black-background-with-a-keyboard-and-a-compass-the-concept-of-engineering-or-design-work/1044717" target="_blank">Hard hat, notepad, rolls of drawings on a black background with a keyboard and a compass, the concept of engineering or design work</a>" von <a href="https://ccby.de/fotograf/marco-verch" target="_blank">Marco Verch</a> via <a href="https://ccby.de" target="_blank">ccby.de</a>, <a href="https://creativecommons.org/licenses/by/2.0/de/" target="_blank">CC-BY 2.0</a>