what is an open system server
Open Enterprise Server (OES) is a server operating system designed for shared network resources and a virtualization computing environment. Open enterprise server, a product of Novell, is a combination of Netware and Suse Linux enterprise server and can be installed like any of the two depending upon the installation.
Open-source software (OSS) is computer software with its source code made available with a license in which the copyright holder provides the rights to study, change, and distribute the software to anyone and for any purpose. Open-source software may be developed in a collaborative public manner. Open-source software is the most prominent example of open-source development and often compared to (technically defined) user-generated content or (legally defined) open-content movements.