25+ years TLL Media is the most popular Bulgarian Publishing House specialized in technical periodical publications in the field of industrial engineering and technologies, power engineering, ecology and building installations. Currently TLL Media issues SEVEN periodical publications: Engineering Review Magazine Energy Review Magazine Ecology & Infrastructure Magazine TD Installations Magazine South-East European INDUSTRIAL Market Magazine The BULGARIAN TECHNICAL REFFERENCE BOOK Energy Info BG - Who is who in the Bulgarian power industry The flagman of the web media products portfolio is IndustryInfo.bg - the portal of the Bulgarian Industry.