ASSET stands for Asset Source for Software Engineering Technology. ASSET maintains the Worldwide Software Resources Discovery (WSRD) Library, which is a software reuse library and reuse information exchange available to software developers in government, industry, and education. Most of the reusable assets in the library are available for public distribution, although a few assets have not yet been authorized for distribution beyond government agencies and their contractors. An approved account is required to download assets, which are however free of charge. ASSET interoperates with CARDS (Comprehensive Approach for Reusable Defense Software) and DSRS (Defense Software Repository System), AdaIC (Ada Information Clearinghouse), and ELSA (Electronic Library Services and Applications) to allow users to retrieve components from these repositories as well. ASSET has also begun including references to commercial software and documents at not cost to vendors wishing to include references to their products and services.