The Open Library is a project of the non-profit Internet Archive, whose long-term goal is to present "one web page for every book ever published." A recent release of the Open Library brought the total number of book records to over 13.4 million (including over 234,000 records with full-text for the book).
Sometimes it takes a little human intervention to make semantic applications easier to build. The Guardian newspaper has augmented its Open Platform API with unique identifiers for bands and books. In turn, the company has simplified the process of creating a mashup that uses multiple sources to focus on a single work, which may help its content spread farther.
Open APIs are being adopted by a wide range of industries, even those outside the Internet sector. Most recently the pharmaceutical industry is realizing the benefits of APIs in sharing information around drug research. Thomson Reuters now provides the Thomson Reuters Pharma API for investigational drugs data. The service provides access the company's comprehensive source of global pharmaceutical intelligence on drugs.