Despite the lack of funding, research in chemistry, materials science and physics remains strong. Antarctic research is actively carried out through the St. Kliment Ohridski Base on Livingston Island in Western Antarctica. The information and communication technologies (ICT) sector generates three per cent of economic output and employs 40,000 to 51,000 software engineers. Bulgaria was known as a "Communist Silicon Valley" during the Soviet era due to its key role in COMECON computing technology production. A concerted effort by the communist government to teach computing and IT skills in schools also indirectly made Bulgaria a major source of computer viruses in the 1980s and 90s. The country is a regional leader in high performance computing: it operates ''Avitohol'', the most powerful supercomputer in Southeast Europe, and will host one of the eight petascale EuroHPC supercomputers.