42 Use of computerised data (data processing services);Research and development of solutions in the field of computer databases, data processing, data transmission and message transmission; Computer services for the selection, compilation, downloading, storage, compression and decompression of data, in particular of images, video, audio and text; Computer services for the synchronisation of data, in particular of images, video, audio and text, on all kinds of multimedia carrier; Conversion of data and computer programs (except physical conversion); Conversion of data or documents from a physical storage medium to an electronic medium; Computer services for the storage of data, in particular of images, video, audio and text, via a websites and/or any other electronic platform, in particular a platform accessible from a mobile telephone; Data security services; Design of systems for controlling access to multimedia content and for managing access rights to multimedia content, and of systems for controlling multimedia content transmission rights; Design, creation, customisation, implementation and maintenance of websites relating to client satisfaction surveys; Computer programming; Design creation, And development and Software maintenance and Data bases; Certification (quality control) with a view to attesting to the reliability of consumers' opinions and reviews in the context of client satisfaction surveys; Design of programs for evaluating systems for the collection, processing and analysis of data and information, in particular consumers' opinions, in the context of client satisfaction surveys; Devising of technical analysis methods; Testing leading to the issuing of a certificate of conformity to specified requirements (standards, specifications);Evaluation and compliance services (auditing) relating to conformity to specific requirements (standards, norms, frames of reference) in the field of client satisfaction surveys; Research and consultancy in the field of evaluating systems for the collection, processing and analysis of data and information, in particular consumers' opinions, in the context of client satisfaction surveys