Open Access (OA) refers to free, immediate, permanent, online access to digital full-text scientific and scholarly material, primarily research articles published in peer-reviewed journals. There are limited copyright and licensing restrictions on open-access articles, meaning that anyone with Internet access may read, download, copy, and/or distribute them. A primary advantage to authors who make their articles openly accessible is that their research impact is maximized due to a wider audience.
Open Access journals are peer-reviewed journals that provide free, online access to their articles. They do not charge subscription fees to readers or libraries. Instead, they cover their costs through alternate methods including publication fees to authors.