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据《信息时代》1989年7月号报道:美国Tempest产品市场不仅大,而且正在迅速增长。据美国著名统计公司Frost &Sullivan最新统计,1987年的市场交易总额达10亿美元,
According to the “Information Age” reported in July 1989: The Tempest product market in the United States is not only large but growing rapidly. According to the latest statistics from Frost & Sullivan, a well-known statistic company in the United States, the market transactions in 1987 totaled 1 billion U.S. dollars,