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2. Controlled-access highway - Wikipedia

   en.wikipedia.org/wiki/Controlled-access_highway

   The cloverleaf interchange between US 131, M-6 and 68th Street in Cutlerville, Michigan, United States, shows many of the features of controlled-access highways: entry and exit ramps, median strips for opposing traffic, no at-grade intersections and no direct access to properties. This sign, or some variation thereof, is used to denote ...

3. Piggybacking (security) - Wikipedia

   en.wikipedia.org/wiki/Piggybacking_(security)

   No Tailgating sign at Apple Inc. office. In security, piggybacking, similar to tailgating, refers to when a person tags along with another person who is authorized to gain entry into a restricted area, or pass a certain checkpoint. [1] It can be either electronic or physical. [2]

4. Physical security - Wikipedia

   en.wikipedia.org/wiki/Physical_security

   Alarms - Unauthorized access attempts or held/forced doors can trigger audible alarms and alerts. Integration with camera systems also occurs. Access levels - Software can limit access to specific users, groups, and times. For example, some employees may have 24/7 access to all areas while others are restricted.

5. Security identification display area - Wikipedia

   en.wikipedia.org/wiki/Security_identification...

   Security Identification Display Area, or SIDA, is a special security area designated by an airport operator in the US to comply with Transportation Security Administration (TSA) requirements in CFR 49 1542.205.

6. Safety sign - Wikipedia

   en.wikipedia.org/wiki/Safety_sign

   In the 1980s, American National Standards Institute formed a committee to update the Z53 [b] and Z35 standards. In 1991, ANSI Z535 was introduced, which was intended to modernize signage through increased use of symbols, the introduction of a new header, 'Warning' and requiring that wording not just state the hazard, but also the possible harm the hazard could inflict and how to avoid the ...

7. Identify legitimate AOL websites, requests, and communications

   help.aol.com/articles/identify-legitimate-aol...

   • Pay attention to the types of data you're authorizing access to, especially in third-party apps. • Don't use internet search engines to find AOL contact info, as they may lead you to malicious websites and support scams. Always go directly to AOL Help Central for legitimate AOL customer support. • Never click suspicious-looking links.