JSTOR (short for Journal Storage) is a digital library founded in 1995.

Originally containing digitized back issues of academic journals, it now also includes books and primary sources, and current issues of journals.

It provides full-text searches of almost 2,000 journals.

More than 8,000 institutions in more than 160 countries have access to JSTOR; most access is by subscription, but some older public domain content is freely available to anyone.

An academic or scholarly journal is a periodical publication in which scholarship relating to a particular academic discipline is published.

Academic journals serve as permanent and transparent forums for the presentation, scrutiny and discussion of research.

They are usually peer-reviewed or refereed.

Content typically takes the form of articles presenting original research, review articles, and book reviews.

The purpose of an academic journal, according to the first editor of the world's oldest academic journal Henry Oldenburg, is to give researchers a venue to "impart their knowledge to one another, and contribute what they can to the Grand design of improving natural knowledge, and perfecting all Philosophical Arts, and Sciences.".

A digital library is a special library with a focused collection of digital objects that can include text, visual material, audio material, video material, stored as electronic media formats (as opposed to print, microform, or other media), along with means for organizing, storing, and retrieving the files and media contained in the library collection.

Digital libraries can vary immensely in size and scope, and can be maintained by individuals, organizations, or affiliated with established physical library buildings or institutions, or with academic institutions.

The digital content may be stored locally, or accessed remotely via computer networks.

An electronic library is a type of information retrieval system.

In the study of history as an academic discipline, a primary source (also called original source or evidence) is an artifact, a document, diary, manuscript, autobiography, a recording, or any other source of information that was created at the time under study.

It serves as an original source of information about the topic.

Similar definitions can be used in library science, and other areas of scholarship, although different fields have somewhat different definitions.

In journalism, a primary source can be a person with direct knowledge of a situation, or a document written by such a person.

A book is a set of written, printed, illustrated, or blank sheets, made of paper, parchment, or other materials, fastened together to hinge at one side, with text and/or images printed in ink.

A single sheet within a book is a leaf, and each side of a leaf is a page.

A set of text-filled or illustrated pages produced in electronic format for reading on a computer screen, smartphone or e-reader device is known as an electronic book, or e-book.