For many of us, the computer is the means by which we earn a living. To give it a nod, then, is a way of thanking the tool for what it provides in life. It helps put bread on the table and a roof overhead. It gives us work and pleasure, exercises our minds, brings us information, connects us with other people. It is a partner helping us achieve our goals. Nodding also thanks the unseen hands and minds who helped create our machine.