
arXiv (https://arxiv.org) is an open preprint repository established in 1991, covering physics, mathematics, computer science, statistics, and quantitative biology. It provides free PDF and TeX source downloads, supports searching by subject, author, and date, and allows subscribing to new submissions via RSS and the API.
arXiv ID), which helps track research progressAPI and OAI-PMH interfaces for data harvesting and system integrationSuitable for researchers, PhD students, instructors, librarians, engineers, and the media for rapidly sharing drafts, tracking developments in a field, and obtaining references.
Main advantages: free and open, broad subject coverage, frequent updates, and developer-friendly interfaces, facilitating early sharing and scholarly communication.
Note: Papers on arXiv are preprints and are typically not peer-reviewed.