MyOrderDesk offers the ability to place multiple items in a single cart, then during checkout it can collect billing and shipping information. In some cases, the ability to have a cart and shipping/billing information is not needed and instead a quick ordering process is preferred.
In this instance, it's possible to set up specific forms to be "One-Click". As soon as the form is completed you can click the "Place Order" button and it's immediately turned into a job.
To set this up look at the "Cart" settings of a form and restrict the form to be used with only one item per cart and to skip checkout.
On the customer's side when the form is filled out and all required fields are ready they can click "Place Order". Once they have reached the "Order Complete" page they are done with placing an order, no additional steps are needed.