I used to ask "How many have ever used WordPerfect?" Over the years it has gone from about 50% to blank stares.
WordPerfect (WP) couldn't bring itself to accept the existence of Windows, and Microsoft ran past, taking over the market.
Word is Object-Oriented, WordPerfect is Stream-Formatted.
"What does this mean? Well, this basically means that when you make a change to a WordPerfect document, the changes take effect 'From THAT Point Forward'. You generally don't need to select an Object (e.g., a word, sentence, or a paragraph) in order to effect a change. You can simply select a color, a font, a paragraph style, etc, and the whole document will be affected (as stated, from that point forward). Stream Formatted is, as you can imagine, like a stream of formatting that flows throughout the document.
Word, on the other hand, is object-oriented. Every letter, word, sentence, and paragraph is an object. To help people grasp the concept of object-oriented programming, Microsoft uses a simple analogy: oranges. You can imagine that an orange has several attributes that can be changed: it has a color, a texture, etc. It can be changed by being painted or peeled. Therefore, once you understand that you need to select an object when you want to manipulate your Word document, you begin to understand how to work in Word."