Final answer:
Original Equipment Manufacturers (OEMs) are companies that purchase components and assemble them into final products, selling them to end-users or other businesses.
Step-by-step explanation:
Companies that buy components from manufacturers and assemble them to make their own products are called Original Equipment Manufacturers (OEMs). OEMs purchase various parts and use them to assemble a final product, which they then sell to end-users or other companies. This business model is typical in various industries, including electronics, automotive, and computer hardware.