East-West commercial development opportunities after World War I saw a rise in Soviet interest in American and European manufacturing know-how, exploited by Amtorg Corporation. Later, with Western restrictions on the export of items thought likely to increase military capabilities to the USSR, Soviet industrial espionage was a well known adjunct to other spying activities up until the 1980s. "BYTE" reported in April 1984, for example, that although the Soviets sought to develop their own microelectronics, their technology appeared to be several years behind the West's. Soviet CPUs required multiple chips and appeared to be close or exact copies of American products such as the Intel 3000 and DEC LSI-11/2.