Abstract: Computer implemented systems for transferring data while maintaining an acceptable level of data security, methods for transferring data between servers, online management systems comprising a plurality of software modules, and methods of managing construction projects, such as construction of trade show exhibits, as well as software used in such systems. An accounting application such a SOLOMON on an intranet server may initiate communication at particular times with an online management system on an Internet server through an intermediate server, and the accounting application may process information from the management system and return results, a job number, or both. Communication initiated by the Internet server may be prevented, and an estimating module may be the hub of the management system. Data may be shared reducing the need to reenter the same information. Material and customer libraries may be used.