OFFICE FUNCTIONS AND ADMINISTRATION, PROVIDING FILE MANAGEMENT AND SHARING FUNCTIONS IN A NETWORK, FILE SHARING ENABLING MULTIPLE USERS TO SHARE AND WORK ON A FILE, MAINTAINING VERSION CONTROL OF A FILE, MAINTAINING ACCESS CONTROL FOR A FILE, MODIFYING ACCESS PRIVILEGES, TRACKING FILE SHARING AND ACCESS, VIEWING FILES AND DOCUMENTS IN BROWSER, DESKTOP AND WEB ACCESS TO A FILE, DELETING FILES, SENDING NOTIFICATIONS RELATED TO FILE UPDATE