Online database in the context of "Digital library"

An Australian Aboriginal sacred site is a place deemed significant and meaningful by Aboriginal Australians based on their beliefs. It may include any feature in the landscape, and in coastal areas, these may lie underwater. The site's status is derived from an association with some aspect of social and cultural tradition, which is related to ancestral beings, collectively known as Dreamtime (or the Dreaming/s), who created both physical and social aspects of the world. The site may have its access restricted based on gender, clan or other Aboriginal grouping, or other factors.

The sites are protected by various state- and territory-based legislation as part of Australian heritage laws, and the federal Aboriginal and Torres Strait Islander Heritage Protection Act 1984 can be invoked as a "last resort" if the site is not considered adequately covered by legislation in the jurisdiction. The legislation also protects sites of archaeological, historical and cultural significance relating to Aboriginal peoples that may be unrelated to beliefs, and more commonly thought of as Aboriginal Australian heritage sites. States and territories maintain registers of sites of Indigenous significance with searchable online databases. Despite the legislation, some sites are still threatened by mining and other operations. One notable example in recent times was the culturally and archaeologically significant rock shelter at Juukan Gorge in the Pilbara, destroyed by Rio Tinto's blasting in the course of mining exploration in May 2020.

The Australian Heritage Database is a searchable online database of heritage sites in Australia. It is maintained by the Department of Agriculture, Water and the Environment as of 2022, in consultation with Australian Heritage Council. There are more than 20,000 entries in the database, which includes natural, historic and Indigenous heritage places, held in separately maintained lists.

The Occupational Information Network (O*NET) is a free online database that contains hundreds of job definitions to help students, job seekers, businesses and workforce development professionals to understand today's world of work in the United States. It was developed under the sponsorship of the US Department of Labor/Employment and Training Administration (USDOL/ETA) through a grant to the North Carolina Employment Security Commission (now part of the NC Commerce Department) during the 1990s. John L. Holland's vocational model, often referred to as the Holland Codes, is used in the "Interests" section of the O*NET. O*NET is continuously updated by USDOL/ETA, which updates a rotating set of occupations each year on the basis of a multi-method program of research including over 42,000 surveys, expert interviews, and the analysis of job postings. According to O*NET's Paperwork Reduction Act (PRA) notice, the total annual cost of maintaining and updating O*NET is estimated at $9.7 million.

The online public access catalog (OPAC), now frequently synonymous with library catalog, is an online database of materials held by a library or group of libraries. Online catalogs have largely replaced the analog card catalogs previously used in libraries.

The Center for Astrophysics | Harvard & Smithsonian (CfA), previously known as the Harvard–Smithsonian Center for Astrophysics, is an astrophysics research institute jointly operated by the Harvard College Observatory and Smithsonian Astrophysical Observatory. Founded in 1973 and headquartered in Cambridge, Massachusetts, United States, the CfA leads a broad program of research in astronomy, astrophysics, Earth and space sciences, as well as science education. The CfA either leads or participates in the development and operations of more than fifteen ground- and space-based astronomical research observatories across the electromagnetic spectrum, including the forthcoming Giant Magellan Telescope (GMT) and the Chandra X-ray Observatory, one of NASA's Great Observatories.

Hosting more than 850 scientists, engineers, and support staff, the CfA is among the largest astronomical research institutes in the world. Its projects have included Nobel Prize-winning advances in cosmology and high energy astrophysics, the discovery of many exoplanets, and the first image of a black hole. The CfA also serves a major role in the global astrophysics research community: the CfA's Astrophysics Data System (ADS), for example, has been universally adopted as the world's online database of astronomy and physics papers. Known for most of its history as the "Harvard-Smithsonian Center for Astrophysics", the CfA rebranded in 2018 to its current name in an effort to reflect its unique status as a joint collaboration between Harvard University and the Smithsonian Institution. Lisa Kewley has served as the director of the CfA since 2022.

IMDb, historically known as the Internet Movie Database, is an online database of information related to films, television series, podcasts, video games, and streaming content online – including cast, production crew and biographies, plot summaries, trivia, ratings, and fan and critical reviews. As of September 2025, IMDb ranks as the 40th most visited website in the world and the 35th in the United States.

The database contained some 25.9 million titles, and 14.8 million person records as of September 2025.