| Topic Area | 2nd Edition (2006) | 3rd Edition (2018/2020) | | :--- | :--- | :--- | | Industrial Networks | DeviceNet, ControlNet | EtherNet/IP, OPC UA, TSN | | Cybersecurity | Mentioned as “physical security” | Full ISA/IEC 62443 framework | | Wireless | One paragraph on radio telemetry | 22 pages on WirelessHART & ISA100 | | Data Storage | Local historical databases | Cloud historians & edge computing | | Human Factors | Basic HMI color theory | Alarm rationalization (ISA 18.2) |
Before diving into where to find the PDF, you must understand why the third edition (often abbreviated as ABOK 3rd Ed.) has rendered previous versions obsolete.
The first two editions focused heavily on classical instrumentation and pneumatic controls. The Third Edition, however, is written for the era of the Industrial Internet of Things (IIoT), Industry 4.0, and cybersecurity. | Topic Area | 2nd Edition (2006) |
If you are studying for the CAP (Certified Automation Professional) exam or the CCST (Certified Control Systems Technician) exam, the third edition is the mandatory syllabus.
Many university libraries and large EPC firms subscribe to Knovel (now part of Elsevier). You can access the full ABOK 3rd Ed. via their web interface as a searchable PDF. Check your corporate learning portal. The Third Edition , however, is written for
Absolutely. Whether you pay $199 for the official PDF or access it via a $49 monthly subscription, the Automation Body of Knowledge, Third Edition is the single most efficient way to close skill gaps in industrial automation.
The Automation Body of Knowledge (ABOK) is not a single-narrative textbook; it is a structured compendium of 16 core areas. When you locate the full PDF, you are getting 400+ pages of cross-functional knowledge. You can access the full ABOK 3rd Ed
Here is a breakdown of the major sections you will find in the full document:
A monthly subscription ($49/month) gives you access to 60,000+ technical books, including the complete ISA ABOK 3rd Ed. This is the most cost-effective route if you need the PDF for a 2-month CAP exam prep window.