1. A method, comprising: registering a global unique user login information configured to allow access to a plurality of different online applications in association with an online application system, the different online applications including a first online application that provides access to a first one or more files stored at one or more servers associated with the first online application, a second online application that provides access to a second one or more files stored at one or more servers associated with the second online application, a third online application that provides access to a third one or more files stored at one or more servers associated with the third online application, and a fourth online application that provides access to a fourth one or more files stored at one or more servers associated with the fourth online application; receiving the global unique user login information in connection with a user logging in; identifying at least one first online application identifier associated with the first online application for registration purposes; identifying at least one second online application identifier associated with the second online application for registration purposes; identifying at least one third online application identifier associated with the third online application for registration purposes; identifying at least one fourth online application identifier associated with the fourth online application for registration purposes; receiving an indication to add access to the first online application for registration purposes; receiving an indication to add access to the second online application for registration purposes; receiving an indication to add access to the third online application for registration purposes; receiving an indication to add access to the fourth online application for registration purposes; in connection with the at least one first online application identifier associated with the first online application, allowing registration of the first online application by: utilizing data required for the first online application, and receiving preference information associated with the first online application; in connection with the at least one second online application identifier associated with the second online application, allowing registration of the second online application utilizing data required for the second online application, and receiving preference information associated with the second online application; in connection with the at least one third online application identifier associated with the third online application, allowing registration of the third online application by: utilizing data required for the third online application, and receiving preference information associated with the third online application; in connection with the at least one fourth online application identifier associated with the fourth online application, allowing registration of the fourth online application by: utilizing data required for the fourth online application, and receiving preference information associated with the fourth online application; displaying the at least one first online application identifier associated with the first online application for access purposes; displaying the at least one second online application identifier associated with the second online application for access purposes; displaying the at least one third online application identifier associated with the third online application for access purposes; displaying the at least one fourth online application identifier associated with the fourth online application for access purposes; receiving a selection of the at least one first online application identifier associated with the first online application for access purposes; receiving a selection of the at least one second online application identifier associated with the second online application for access purposes; receiving a selection of the at least one third online application identifier associated with the third online application for access purposes; receiving a selection of the at least one fourth online application identifier associated with the fourth online application for access purposes; in response to the selection of the at least one first online application identifier associated with the first online application for access purposes, allowing access to the first online application, utilizing the data required for the first online application; in response to the selection of the at least one second online application identifier associated with the second online application for access purposes, allowing access to the second online application, utilizing the data required for the second online application; in response to the selection of the at least one third online application identifier associated with the third online application for access purposes, allowing access to the third online application, utilizing the data required for the third online application; in response to the selection of the at least one fourth online application identifier associated with the fourth online application for access purposes, allowing access to the fourth online application, utilizing the data required for the fourth online application; identifying a document in association with the online application system; receiving a request from a logged-in user; in response to the request, displaying an interface for receiving an indication of one or more tags, the interface including: at least one text box for receiving manually inserted tags, and a list of potential tags; utilizing the interface, receiving the indication of the one or more tags; and correlating the one or more tags with the document.