A(n) is like a special-purpose computer whose responsibility is to handle the details of input/output and to compensate for any speed differences between I/O devices and other parts of the computer

I/O controller

Explanation:

I/O Controller (IOC) also referred to as an Input/Output Interface, is a device that interfaces between an input or output device and the computer or hardware device. An I/O controller connects input and output (I/O) devices to the bus system of a central processing unit (CPU). It typically communicates with the CPU and with the system memory over the system bus and can control many devices. The input/output controller on a computer is commonly located on the motherboard. However, an I/O controller can also be an internal add-on that can either be used as a replacement or allow for additional input or output devices for the computer.