South Korea\'s market for online or electronic education systems dubbed \"e-learning\" rose sharply last year due to the rising demand for services on mobile devices, the government said Tuesday. The combined sales of the country\'s e-learning service operators came at 2.7 trillion won (US$2.48 billion) last year, compared to 2.45 trillion won tallied a year earlier, according to the data by the Ministry of Trade, Industry & Energy.