Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

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  A computer or hardware device and/or associated operating system, or a virtual environment, on which software can be installed or run. Examples of platforms include Linux™, Microsoft Windows Vista®, and Java™.
NISTIR 7695 from ISO/IEC 19770-2 - Adapted

  In the context of the CPE Applicability Language specification only, a logical structure combining one or more bound CPE names through logical operators.