migration

[masterding]

Quotes from VOA news:
In 2007, high-tech pioneer Bill Gates predicted that "Yellow Page usage amongst people, say, below 50, will drop to zero, near zero over the next five years."
Things aren't that drastic yet.
But it's clear that young people seeking information about, and reviews of, businesses are leading the migration away from Yellow Pages and toward the Internet and handheld devices.
The printed big book survives, but in some communities you have to request a copy to get one. It isn't plopped onto your front porch once a year as it used to be.
The Associated Press reports that categories in these directories are also changing fast to reflect our times. You won't find "Discos" in the yellow pages any more, or "Drive-in Movie Theaters," "Typewriter Repair," or "Moustache Wax." Now it's "Body Piercing," "Teeth Whitening," "Satellite Equipment" and "Dating Services."
The AP even found a trendy new category in the Richmond, Virginia, Yellow Pages. It's for businesses that organize clients' homes by employing the ancient Chinese art of arranging objects to improve one's fortunes.
The listing: "Feng Shui."
My questions are:
1. Does 50 imply 50%? Is percentage omittable here?
2.What does "migration " mean here?
3..The setence seems repetitive to me, Can I just simply say you have to request to get a copy?
4.Does "listing" have same meaning as "category' here? Can I just say "the category":"Feng Shui."?
Thank you.

[SoothingDave]

1. Yes, it means 50%. This is reported speech. "%" can be dropped sometimes in speech if it is understood that it is meant. I wouldn't drop it in writing.

2. Migration is a massive movement. Like birds migrate from north to south for the winter. It is speaking of people collectively moving from one thing (yellow pages) to another (internet searches).

3. Yes, it's a tad redundant.

4. "Listing" is the jargon used with Yellow Pages. "Category" is a suitable synonym.

[Gillnetter]

I read the 50 to mean age. People under 50 do, or will, not use this book.

[5jj]

I read the 50 to mean age. People under 50 do, or will, not use this book.

So did I

[masterding]

I read the 50 to mean age. People under 50 do, or will, not use this book.

I got your point.Thanks!

[SoothingDave]

I read the 50 to mean age. People under 50 do, or will, not use this book.

So do I, now that you've mentioned it.