By all means, sit at your computer and write whatever you want.

He sat at his computer, in the apartment, trying to think of a story.

Sitting at my computer one night, I must have read 200 profiles.

Besides, I have to do a lot more than sit at my computer and write.

She sat at his computer, playing a card game.

The response reaches me within minutes, as if he is sitting at his computer waiting to hear from me.

How many people will be inclined to sit at their computer and watch such broadcasts?

I sat there at my computer for a moment, trying to process this information.

Jeff comes into the cafe and sits at his computer.

Half an hour later as I was sitting at my computer it settled in the hawthorn outside the window, along with 32 of its friends.