A computer-implemented vault centrally archives an application from a client. Each application may be formed from one or more files, and each application has a unique meta description for reconstructing the application using the one or more files. The vault has one or more files which may be shared among applications; an access controller for allowing the client to retrieve a file from the vault based on the meta description; and a post controller for allowing the client to store a single instance of a uniquely indexed file based on the meta description.