Apower supply unit for a computer converts:
a. alternative current to direct current.
b. direct current to alternative current.
c. 110 voltage to 220 voltage.
d. 220 voltage to 110 voltage.

For anyone else who might need help with this question. A power supply converts: A. Alternative Current to Direct Current.

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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).