Unless otherwise noted, all the companies are owned by US investors. Your decision, then, is to be based on what appears in the descriptions of the company's products listed below. Ace Computers, Inc. is the USA-subsidiary of an multinational company with foreign ownership. Ace designs and manufactures personal computers. Acme Medical Electronics, Inc. designs and manufactures human health-monitoring hardware.
Principal sales are to hospitals and physicians.
Inc. Designs and manufactures communications hardware and specializes in electronic surveillance equipment. A significant fraction of their revenues are probably from sales to the U.S. Central Intelligence Agency. Able Electronics, Inc. designs and manufactures expensive electronic gadgets. Most persons would consider their products luxuries. State your reasons.