Investment policy of the Polish United Workers' Party and its effects: the Katowice smelter, a car factory in Bielsko-Biala, the Northern Port; the copper mine in Rudna; the smelter in Glogow; tape recorders produced by ‘Unitra’; the ‘Elana’ factory from Torun; the sulfur basin in Tarnobrzeg; the Central Railway Station etc.