Wikipedia is a wiki, but only one specific wiki is Wikipedia

"WP" looks like WordPress to me.

I thought Washington Post

I am old enough to still see "WordPerfect"...from the 1980s.

I'll have you know I learned typing in WP (word perfect) in the late 90's still.

(I guess they preferred typing on DOS based systems even though windows 98 was mainstream by then since it meant you couldn't alt-tab and lose focus or cheat somehow? IDK know. Maybe it was a licensing issue)

Well, I am old enough to still see William Penn...from the 1680s.

You don't look a day over 200.

It's a common inside wikipedia itself. For example, WP:POV is used to link to the "neutral point of view" meta page.