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What's OT?

why doesn't google docs use DS? Who uses DS?

What's the best choice of making something similar to google docs' co-edit feature?

I found this page informative and interesting


it has a live visualization of the OT algorithm

The live visualization was a lot of fun to play around with.

WRT "What's OT?": https://en.wikipedia.org/wiki/Operational_transformation

The wiki article includes information that should answer your last question as well.

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