Article: Double digits: the 100 largest security installation and monitoring companies, the SDM 100, attained double-digit growth in 2007 in both recurring monthly revenue and total revenue.(Statistical table)

What do you remember about 1991? In May of that year, SDM marked publication of the first annual SDM 100, a ranking by revenue of the largest security installation companies in the United States. The SDM 100 proved to be a cornerstone of the security industry, as it heralded in a new era of public information about an industry that was--and still is--largely privately held.

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Although some entities exist only in the memories of today's security dealers, it is encouraging that many of the companies ranked 18 years ago still rank among the largest today.

In May 1991, the first annual SDM 100 had total annual revenue of $2.32 ...

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