A brief review of current problems in the research of hot emission-line stars is presented. Special attention is paid to problems of reliable determination of basic physical properties of underlying stars and to possible role of duplicity in the whole phenomenon. A preliminary catalogue of OBA emission-line stars in binaries is also included.
(Conclusions) Importance of the social behaviour of astronomers for the astronomical research has been pointed out. Several distinct types of stellar astronomers have been described and classified. However, more observational data are urgently needed before a physically justified classification will be possible.