From OpenSCADAWiki
In the role of the common operating system (program platform) for development and using there was selected Linux OS, which is an optimal solution of the following issues:
- reliability — a large part of servers and clusters running on GNU/Linux OS;
- flexibility/scalability — due to its openness and modularity Linux allows to build solutions to meet any requirements;
- availability — due to being under the license GPL the software is a fully free (libre) operational system and for high qualified users it can be also a non-cost one;
- popularity, advancement, support and prevalence — the system is in active development by many enthusiasts, firms and government agencies throughout the world, and is gaining wide support on the personal and the corporate marketplace.