In late 1985 North Korea's first integrated circuit plant became operational. By the early 1990s, North Korea was producing about 20,000 computers a year, reportedly 60% were exported and the remainder were mostly for domestic military use. The development of a software industry started in the early 1990s. In general, software development is on a high level and it could become a major export item in the future, along with world-class voice recognition, automation and medical technology. North Korea has developed its own operating system, the "Red Star", and has an intranet network named "Kwangmyong", which contains censored content from the Internet. North Korean IT specialists demonstrate a high degree of technological literacy.