CAD

Steam locomotive frame drawn with FreeCAD tool by wieszak.

From Wikipedia:

Computer-aided design (CAD) is the use of computer systems to assist in the creation, modification, analysis, or optimization of a design. CAD software is used to increase the productivity of the designer, improve the quality of design, improve communications through documentation, and to create a database for manufacturing. CAD output is often in the form of electronic files for print, machining, or other manufacturing operations.

External Links

• "Computer-aided design", Wikipedia
• "A360 Viewer", Online CAD File Viewer, Autodesk
• LibreCAD
• FreeCAD
• BRL-CAD