HEATKEYS

GrabCAD - a free CAD model library with 2D / 3D CAD files available for software like SolidWorks, AutoCAD, Autodesk Inventor, Solid Edge, SketchUp etc.

Push your learning experience beyond the classroom with companion resources supporting many Goodheart-Willcox textbooks.

Autodesk Seek is the online source for product specifications and models for use in Revit, Autocad, 3ds Max, Maya and other CAD applications

- Standard Electric Supply Co.

Legrand offer products and systems for electrical installations and information networks

SCHURTER is a leading innovator, manufacturer and distributor of fuses, connectors, circuit breakers, input systems and EMC products. We focus on components and systems ensuring the clean and safe supply of power and ease of use of equipment.

Download AutoCAD blocks and symbol libraries here at ArchBlocks - Free AutoCAD symbols/tutorials - Download AutoCAD eBooks - CAD titleblocks.

archtoolbox.com -- Your one-stop source for all of the technical reference information architects need, but just can

Hammond Manufacturing a leading manufacturer of industrial enclosures, electronic enclosures, racks & rack cabinets, transformers, outlet strips and climate control products.

AutomationDirect - Industrial control products: PLCs, AC Drives, Operator Interfaces, Enclosures, Pushbuttons, Sensors, Motor Controls, Power Supplies, and more!

Architectural information on building materials, manufacturers, specifications, BIM families and CAD details.