oak floor refinsihing

Our house has the oak tongue and groove flooring. Over the years, the clear finish (whatever it is) has worn down/off in many places.
The last time I had any awareness of oak floor refinsihing was back in the early '50s. Then, you rented a big, heavy, screamer of a belt sander, and the air would get hazy with sanding dust. Natch, you only did this in empty houses. And, you had to change belts every 20 min or so because the old one would get loaded up with varnish residue which was melted by the belt action, and then stuck to the belts. Varnish being the only clear finish used back then.
We need to have our floors refinished. However, we also have a house full of furnishings.
We can move everything out of one room at a time, without major trouble.
I'm wondering if there are newer dustless processes that will enable us to do this without the entire house becoming a "dust disaster"??? Here's hoping modern day technology has increased to the point of solving some of these problems.
What should I expect when I start out my search for floor refinsihers?
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wrote:

that took forever to do a barely adequate job. The other I hired a pro with a drum sander who had it done in no time including edges. Dust was not a problem, what there was could be easily vacuumed up.
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