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2. Emergency service response codes - Wikipedia

   en.wikipedia.org/wiki/Emergency_service_response...

   Code 3: Respond to the call using lights and sirens. Code 2: Respond to the call with emergency lights, but without sirens. Alternatively, sirens may be used if necessary, such as to make traffic yield or when going through intersections. Code 1: Respond to the call without emergency lights and sirens.

3. 3-D Secure - Wikipedia

   en.wikipedia.org/wiki/3-D_Secure

   3-D Secure is a protocol designed to be an additional security layer for online credit and debit card transactions. The name refers to the "three domains" which interact using the protocol: the merchant/acquirer domain, the issuer domain, and the interoperability domain.

4. Hospital emergency codes - Wikipedia

   en.wikipedia.org/wiki/Hospital_emergency_codes

   Code black: security needed someone is armed and is a threat to themselves or others; Code grey: security needed, someone is unarmed, but is a threat to themselves or others; Code blue: life-threatening medical emergency; Code brown: external emergency (disaster, mass casualties etc.) Code orange: evacuation; Code purple: bomb threat; Code red ...

5. What Is a Credit Card Security Code and Why Is It Important?

   www.aol.com/credit-card-security-code-why...

   The three- or four-digit code on credit and debit cards can be either a card security code or a card verification value. A three-digit CVV is located on the back of Mastercard®, VISA® and ...

6. Card security code - Wikipedia

   en.wikipedia.org/wiki/Card_security_code

   The first code, 3 numbers, called CVC1 or CVV1, is encoded on track one and two of the magnetic stripe of the card and used for card present transactions, with signature (second track also contains pin verification value, PVV, but now it is usually all zeroed out and service code).

7. Reset or change your password - AOL Help

   help.aol.com/articles/account-management...

   Sign in to the AOL Account security page. Click Change password. Enter a new password. Click Continue. From most AOL mobile apps: Tap the Menu icon. Tap Manage Accounts. Tap Account info. Tap Security settings. Enter your security code. Tap Change password. Enter a new password.