Available in multiple languages. The “HowOpenIsIt?” Open Access Spectrum (OAS) guide standardizes Open Access terminology in an easily understandable, comprehensive resource created by PLOS, the Scholarly Publishing and Academic Resources Coalition (SPARC) and the Open Access Scholarly Publishers Association (OASPA). The guide defines core components of Open Access derived from the articulation of basic tenets in the 2002 Budapest Open Access Initiative (BOAI). The goals of the guide are to: Move the conversation from “Is It Open Access?” to “HowOpenIsIt?"; Clarify the definition of OA; Standardize terminology; Illustrate a continuum of “more open” versus “less open”; Enable people to compare and contrast publications and policies; Broaden the understanding of OA to a wider audience; Determine how open a publisher and/or publication is by using the grid.