What is Open Access?
Open-access (OA) literature is digital, online, free of charge, and free of most copyright and licensing restrictions. What makes it possible is the internet and the consent of the author or copyright-holder.
A Very Brief Introduction to Open Access by Peter Suber
Open Access Principles
The open access movement promotes the practice that scholarly research is made available online without unnecessarily high costs allowing for quicker and broader dissemination of information
Open access is compatible with features of traditional publishing such as peer review, journal prestige, and researchers' career advancement. It also offers many advantages, including: