ELI5: Explain Like I'm 5

Physical information security

Physical information security is all about keeping your information safe from people who might want to use it for bad things. It involves making sure that computers, papers with personal information, and other important items are kept safe from people who shouldn't have access to them. This might mean keeping things in a locked room, or using passwords on computers and phones. Additionally, it is important to make sure that no one can steal the items, or put a camera or listening device near them.
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