to work · to operate · to manipulate

What's your favorite operating system?

On some OS's you get gibberish for filenames with full-width characters so when downloading please change to a suitable filename.

On the client side, very time-consuming operations should run asynchronously so as to avoid freezing the browser. The best example is the operation of Ajax.

I didn't like the interface of that operating system.

Branching and merging are two basic operations of revision control.