By the mid-1960s unilateral deterrence gave way to 'mutual deterrence', a situation of strategic stalemate. The superpowers would refrain from attacking each other because of the certainty of mutual assured destruction, better known as MAD. This theory is still a major part of the defense policies of the United States and Russia. This led to the foundation of the nuclear triad, or use of three different types of delivery systems (bombers, missiles, and submarines), to assure that a second-strike capability existed able to cause massive destruction to the attacking nation.
What costs do they measure? The difference between cost per thousand (CPM) and cost per rating point (CPRP) is that CPM measures the dollar cost of reaching 1,000 members of the media vehicle's audience. CPRP is a relative measure of the efficiency of a media vehicle to a firm's target market.
Please help improve this article by adding citations to reliable sources. Unsourced material may be challenged and removed. (September 2009) (Learn how and when to remove this template message) A coordinate measuring machine (CMM) is a device for measuring the physical geometrical characteristics of an object. This machine may be manually controlled by an operator or it may be computer controlled. Measurements are defined by a probe attached to the third moving axis of this machine.