COBRA and NCE/UFRJ kept developing, and tried to convince the Brazilian government to prohibit the further entrance of AT&T UNIX into Brazil, since the operating systems they developed, (COBRA and Plurix), were similar to AT&T's and could do the same things. The Brazilian IT industry in the 80s was a protected market, so a foreign company couldn't sell a product in Brazil if a Brazilian IT company offered similar hardware or software. COBRA had a very strong argument: the similarity of its OS was recognized by X/OPEN.