Donald pressed a series of control studs and spoke again.

His gloved hand brushed across a control stud on the bar.

Or without the secret of the control studs.

John spun back, the flat of his hand slamming into the control stud on the wall beside him as if it was Smith's face.

He pushed the control stud; it clicked, loud in the quiet night.

For answer, Fraffin moved a control stud beneath his desk.

He swung the bank of control studs within easy reach, moved them lovingly.

Then he touched the control stud next to him and saw the door open.

He dumped the package in the "Send" bin and depressed the control stud.

The captain swore and jabbed at several of its control studs without result.