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== PS1 (''pasztecik szczeciński'') ==

PS1’s are actually Russian ''pirozhki'' mass-produced in a special ''pirozhki''-frying machine, called AZhZP-M, which has been developed by the Red Army and is still manufactured in a Ukrainian arms factory. The first such machine, from army surplus, appeared in Szczecin in 1969. ''Pirozhki'' may be easily confused with Polish ''pierogi'', even as they have little in common apart from the basic idea of wrapping some kind of filling with dough and both their names coming from the Proto-Slavic word *''pir'', meaning “a feast”.