Computers are used to solve different problems. For solving these problems computer software and hardware are used, but for operations of those computing facilities a Data Centre is necessary. Therefore, development of the data centre is subordinated to solvable tasks and computing resources. We are studying the history of data centres' development, taking into consideration an understanding of this. In the beginning of the computer era computers were installed in computing centres, because all computing centres have defined requirements according to whom their operation is intended for. Even though the concept of 'data centre' itself has been used since the 1990s, the characteristic features and requirement descriptions have been identified since the beginning of the very first computer operation. In this article the authors describe the historical development of data centres based on their personal experience obtained by working in the Institute of Mathematics and Computer Science, University of Latvia and comparing it with the theory of data centre development, e.g. standards, as well as other publicly available information about computer development on the internet.

Abstract. The article describes the development of information technology in Latvia, in IMCS, to the middle of the 1990s. The history of IMCS represents the usage of computers in typical computing centers in the former Soviet Union and the transformation from computing center to research institution. It also represents Latvian collaboration with the Nordic countries that provided political, scientific, and technological support. Historical documents, computer parts, and photos are collected in the Computer Museum of IMCS.

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Abstract-Institute of Mathematics and Computer Science, University of Latvia continues its enduring development of research e-infrastructure. Currently IMCS UL maintains Scientific Cloud computing facility, provides collocation, hosting and virtualization services. As well it operates as a node for online correlation data streaming services from Irbene radio telescope in real time, HPC resources' disposal for computing tasks, usage of big data extracted from data storage for modeling and also for graphic data processing.In this article authors represent pricing policy realized in IMCS UL for cloud computing services. We define the groups of users and prices for services for each user group. Users are split in groups as follows: business companies (defined as Service Price List), research institutions (defined as Service Fee List) and research project partners (defined as Service Coast List). In price list fixed price level can be evaluated with simple cloud computing pricing Model.