What is the hardware component that contains soldered parts and slots for other pieces of hardware that can be removed?

An expansion bus is a set of electrical connections that allows for the expansion of a computer system by adding peripheral devices. While expansion buses facilitate the connection of additional hardware components to the system, they do not typically contain soldered parts or serve as the primary platform for integrating various system elements.

The system clock is responsible for regulating the timing and synchronization of various operations within a computer system. It does not inherently contain soldered parts or expansion slots for hardware components, as its primary function is to manage the timing of system processes.

A hard drive is a storage device used to store data on a computer system. While it plays a crucial role in data storage and retrieval, the hard drive does not contain soldered parts or expansion slots for adding or removing hardware components. Its function is primarily related to data storage rather than hardware integration.