From the point of view of the cloud-based technology development this concept does not represent such a revolutionary innovation. The 60ies and 70ies were dominated by mainframes which, in a modified form, survive to these days. The concept of mainframes was based on sharing huge (at that time) amount computing resources by many users simultaneously. Mainframes were large, energy-intensive and demanding professional skilled personnel, but in that period it was almost the only available technical means for mass data processing. The only access to the central processing system was through unintelligent terminal, while the distant access was provided by the modem connection through commonly available telephone lines. Running programs took place almost exclusively in batch mode and real-time applications were the privilege of academic, research or army communities. Yet this platform contained the seeds of today’s cloud-based technology, for example, when at the turn of the 60ies and 70ies, IBM has developed and implemented virtual machines technology into the Mainframe operating system It is exactly the concept of large secure centralized computing power with mass data storage that has become the prototype of today’s concept of cloud.