She turned her face away from him and looked down at the keyboard.

I went to the table and looked at the keyboard.

At the keyboard she is all business, calling no attention to herself.

If the person at the keyboard says no, regular work can continue.

He put his bag on the floor and sat at the keyboard of the computer.

After this, she tried the piece again at the keyboard.

He sat at the keyboard and turned on the organ.

Once there, she went to her desk, sat down at the keyboard and started to write.

He locked his hands together and forced them at the keyboard.

There she composed at the keyboard, but the writing didn't go well.