CGA Fitting Reference. A CGA fitting is the standardized system for the attachment of a compressed gas cylinder to the required regulator or transfer line. Examples of CGA fittings would be CGA-580 for Non-flamable, Non-oxidizing gasses such as Nitrogen, Argon, or Helium. CGA-590 is used for compressed air and CGA-326 is used for Nitrous Oxide.
Google Authenticator is a mobile security application based on two-factor authentication (2FA) that helps to verify user identities before granting them access to websites and services.
The Authenticator app is based on the time-based one-time password (TOTP) system specified in the IETF's RFC 6238 document. The TOTP algorithm generates a six-digit passcode that factors in the current time of day to ensure that each passcode is unique. Passcodes are changed every 30-60 seconds for further security. See a video demonstration of setting up Google Authenticator: