--Can I use this terminal for a while?
--All yours.

--Can I borrow your book <<How to create spaghetti code>> for two days?
--All yours.

--Can I use your credit cards for two weeks? :-)
--All yours.

If somebody asks your permission for using something that you are using, you may simply say "All yours". This should not be a problem for native-English speakers, but it takes time for Chinese guys to pick it up. One of my Chinese co-workers insists saying "Yes, please". But all the other people in my team say "All yours". Some even say "yours."