Chapter 29, “Open Access Science,” is a commitment to transparency, accessibility, reproducibility, and generally collaborative practices. Open access (i.e., the removal of paywalls) to scientific research is one of the central tenets of open science. This can take a variety of forms, from “gold” (the author pays to publish but readers have free access) to “diamond” (the author does not pay but readers have free access) to “green” (articles under copyright are disseminated on the internet, usually after an embargo). Another tenet of open science is the transparency of the reviewing process, often accompanied by preregistration of experiments and/or preprints (i.e., publication in online repositories, prior to acceptance by a journal). The Open Science Framework, which facilitates these processes is also discussed.