42 Conducting technical tests, checks and measurements; Technical consultancy in the field of network and connection technology; Rental and maintenance of storage places; Rental of cabinets, housings and/or racks for data processing equipment; Installation and maintenance of network systems (software); Computerization, technical consultancy and technical planning for electronic monitoring installations for room control, temperature control, humidity control and access control for control installations for computer centers, for cooling installations for computer centers, switching hubs, measuring and server rooms, for cooling installations for computer cabinets, server cabinets, and parts and modules for the aforesaid goods, for air conditioning installations, cooling ceilings, humidifying apparatus; Computer security system monitoring services; Rental of spaces for telecommunications, multimedia installations and computer installations and computer services in the context of data centers