
The brand-new 22nd Edition of this invaluable reference is being released as the GA-600 PLUS -- a print + digital combo that gives you instant access to these systems any time any place! In the ebook you can go right from the table of contents to the section of your choice, and you can download individual pages.
The brand-new 22nd Edition of the GA-600 features over 150 completely new systems. Altogether it contains over 700 fire- and sound-rated systems, including: