Google 2 Step Verification

First, you can go to 'Signing in to Google'.

Second, you can click the '2-step verification'.

You can find the view that you can select phone or mail.

I selected the phone.

By SMS, you can verify your phone.

And then, you can verify one more by using SMS or ARS.

You can find the 'turn on 2-step verification' window.

You can click the 'App-specific password', and then you can click 'manage application-specific password'.

You can chose the app.

Finally, you can get the app password for 2-step verification.