Official Reference Documentation for The Curtiss Annotation Nomenclature (C.A.N.) System
The Curtiss Annotation Nomenclature (or C.A.N.) is a simple, standardized system for annotating what you read. It helps you make the most of limited margin space, pushes you to engage more deeply with texts, and makes reading (and re-reading) more rewarding.
We who love books know the truth: margins are precious real estate. Whether you’re wrestling with philosophy at midnight, marking up a novel on your commute, or color-coding your textbooks, you need a system that’s clear, consistent, and actually useful when you flip back through months later.
That’s what C.A.N. gives you—a shared language for the conversations we have with our books. No more deciphering your own cryptic margin notes or wondering what something meant three years ago. Just clean, purposeful annotation that serves you now and later.
Happy Annotating! And most of all, Happy Reading!
A Note On Versioning
The version number tracks the Official Guide PDF. Major versions mean CAN Codes may have changed, minor versions mean explanations changed. See the Changelog for details.