File:Drafting machine.jpg - Wikimedia Commons

File:Leonardo Design for a Flying Machine, c. 1505.jpg - Wikimedia Commons

File:Electrical machines. Wellcome M0014510.jpg - Wikimedia Commons

File:Telegraph - relay.jpg - Wikimedia Commons

File:Drawing of an old Raschel machine.jpg - Wikipedia

File:Writing table (bureau plat) MET ES2403.jpg - Wikimedia Commons

File:Perspectival Drawing of a Cradle MET DP803352.jpg - Wikimedia Commons

File:Mosin nagant schematic.jpg - Wikimedia Commons

File:Redheffer machine.JPG - Wikipedia

File:Israel Overall's Patent Drawing for a Machine for Boring Rock - DPLA - 0a9c45166eeeaca6c31f0d192e38b9cc.JPG - Wikimedia Commons

File:Drawing, Design for Kidney-Shaped Writing Table with Eight Drawers, 1900–05 (CH 18681325).jpg - Wikimedia Commons