por·tal
noun
1.
a door, gate, or entrance, especially one of imposingappearance, as to a palace.
2.
an iron or steel bent for bracing a framed structure, havingcurved braces between the vertical members and ahorizontal member at the top.
3.
an entrance to a tunnel or mine.
4.
Computers . a Web site that functions as an entry point tothe Internet, as by providing useful content and linking tovarious sites
and features on the World Wide Web.
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Except the first image you saw.
It is a Test Card
&
the definition is from the web.
Hahaha.
