When I was a kid someone gave me a game compressed with ARJ... Internet didn't existed yet in my country, took me 3 years to figure out how to open that file,

When I was a kid someone gave me a game compressed with ARJ... Internet didn't existed yet in my country, took me 3 years to figure out how to open that file, and in the meantime I infected my computers multiple times with tons of viruses (seemly packing viruses in unzippers was popular... the one with most viruses was "pkunzip" or something like that)