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What are the three parts to physical security standards for various types of army equipment and the risk level

Your mom wants to purchase a laptop computer. she said she wants her new computer to be able to play her dvds so she can listen to music and wants to know what type of optical drives will play her disk. which type of drive should she look for?

Aman travel 200m towards east< br /> from his house then takes left< br /> to turn and moves 200 m north< br /> find the displacement & distance.< br />