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> 人や荷物の移送を **商売とする** 馬車輸送がそこかしこで見受けられるようになっている。

I don't understand what とする does in this sentence. Can someone explain it to
me?

Thanks!
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2015-10-08T18:21:08.607
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grammar particle-と
What does とする do in this sentence?
とする in this case means "to treat as; to use for."  
It can be broken down into と "as/with" and する "to do."

> 人や荷物の移送を商売とする馬車輸送  
>  Horse-drawn transport carriages that use the transportation of (stuff like)
> people and luggage for business.
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2015-10-08T19:25:04.223
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とする here makes an attribute out of a noun 商売 "trade, business".

Literally meaning "making (transport of people and goods) a business", it
corresponds in this context to English " **commercial** horse-drawn transport
of goods and people"
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2015-10-09T03:30:09.317
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answer