Organization of shows and fairs for cultural or educational purposes; organization and conducting of colloquiums, conferences, congresses, seminars, symposiums; game and toy exhibition services; organizing and conducting exhibitions, shows, cultural or educational competitions; museum services; presentation of exhibitions in museums; photographic and audiovisual production; audiovisual display presentations; providing non-downloadable electronic publications online; online publication of spec...

Software; system software; software; firmware; communication software; telecommunications software; embedded operating software, audio converters; analogue to digital converters; signal convertors; electroacoustic transducers; converters, electric; frequency transformers; metric converters; low noise converters; level converters; aerial converters; current convertors; high frequency convertors; television standards converters; ultrahigh frequency translator apparatus; ultrahigh frequency tran...