1. Programmable logic controllers (also called PLCs) are used to control machines and other
industrial applications with
instead
of using hard-wired devices.

professionals can use many types of technology that can them. some examples are, computers (they research and can use for programs for data, they are also used for job applications, school work, and even to make new ideas), speedometers (can get data for unknown data), sometimes something as small as a pen (used for rough drafts, to insert data, and again job applications).