Which of input and output buses is used by todays pcs?

Today's PCs primarily use both input and output buses to facilitate communication between the CPU, memory, and peripheral devices. Input buses, such as USB and PCIe, are used to connect devices like keyboards, mice, and graphics cards, while output buses transmit data to displays, printers, and other output devices. Modern systems often use a combination of buses for efficient data transfer and processing, with USB and Thunderbolt being notable examples of versatile input/output interfaces. Overall, both types of buses are essential for the seamless operation of today's computing systems.