Build your personal Device Libraries as you go. Just start designing your system and your library builds itself while you work.
Every time you save a new device or save an edited device, it gets stored as a symbol in the current document.
The Vectorworks Resource Browser allows you to view symbols and drag/drop them into your drawing. Export your frequently-used device symbols to a library document and add this to the Resource Browser favorites for easy access on every project.
Working in group? Set up a library document on your network and share devices with your team.