This GroupDocs.Merger .NET SDK provides API access to this service. The API allows you to combine multiple documents of the same format into one, or split single document, to multiple docs, along with support to reorder and remove pages, images and diagrams. This includes merging and trimming popular document formats for; Microsoft Office, PDF, OpenDocument, LaTex, EPUB and more. It provides a way to perform pages manipulation, transformation and document rendering operations on secured files, with the ability to add or remove passwords on supported document formats. GroupDocs provides document manipulation APIs that allows you to view, convert, annotate, compare, sign, assemble and search documents in your applications.
There isn't just one social graph, there are many. LinkedIn maintains your professional contacts, while Facebook has friends and family (and yes, often many professional). Twitter has some mix, as well, perhaps with a different filter. Aggregators take these disparate contacts and bring them into one place. A new service uses several APIs to merge them and give tools to better understand and utilize your network of contacts.