The document provides an overview of Biomed Central, highlighting its role in the growth of open access publishing in the biological sciences since its inception in 2000. It outlines the benefits of open access for both readers and authors, including immediate access to articles and the retention of copyright by authors. Additionally, it describes various models of open access publishing and the types of journals published by Biomed Central, emphasizing the significance of article-processing charges and the impact factors of its leading journals.