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157

Centuries: 1st century - 2nd century - 3rd century

Decades: 100s 110s 120s 130s 140s - 150s - 160s 170s 180s 190s 200s

Years: 152 153 154 155 156 - 157 - 158 159 160 161 162

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Digital Rights Management

... abbreviated DRM, is an umbrella term for any of several arrangements by which the usage of copyrighted data by someone who has purchased a copy of it may b ...