typically employ web crawlers for automated collection. Similarly, software code and documentation can be archived on the web, as with the example of CPAN. Other Some archives defy categorization. There are tribal archives within the Native American nations in North America, and there are archives that exist within the papers of private individuals. Many museums keep archives in order to prove the provenance of their pieces. Any institution or persons wishing to keep their significant papers in an organized fashion that employs the most basic principles of archival science may have an archive. In the 2004 census of archivists taken in the United States, 2.7% of archivists were employed in institutions that defied categorization. This was a separate figure from the 1.3% that identified themselves as self-employed. Another type of archive is the Public Secrets project. This is an interactive testimonial, in which women incarcerated in the California State Prison System describe what happened to them. The archive's mission is to gather stories from women who want to express themselves, and want their stories heard. This collection includes transcripts and an audio recording of the women telling their stories. The archives of an individual may include letters, papers, photographs, computer files, scrapbooks, financial records, or diaries created or collected by the individual – regardless of medium or format. The archives of an organization (such as a corporation or government) tend to contain other types of records, such as administrative files, business records, memos, official correspondence, and meeting minutes. Some archives are made up of a compilation of both types of collections. An example of this type of combined compilation is The Transgender Archives at the University of Victoria which contain a multitude of collections of donations from both individuals and organizations from all over the world. Many of these donations have yet to be cataloged, but are currently in the process of being digitally preserved and made available to the public online. The Arctic World Archive is a commercially-run facility for data preservation located in the Svalbard archipelago, Norway, which contains data of historical and cultural interest from several countries, as well as all of American multinational company GitHub's open source code. The data is kept on reels of specially developed film in a steel vault buried deep beneath the permafrost, with the data storage medium expected to last for 500 to 1000 years. Standardization The International Council on Archives