Human–computer interaction
![The user interacts directly with hardware for the human input and output such as displays, e.g. through a graphical user interface. The user interacts with the computer over this software interface using the given input and output (I/O) hardware.
Software and hardware must be matched, so that the processing of the user input is fast enough, the latency of the computer output is not disruptive to the workflow.](/Images/godic/202501/20/Linux_kernel_INPUT_OUPUT_evdev_gem_USB_framebuffer.svg3037.png")
Human–computer interaction (HCI) researches the design and use of computer technology, focusing on the interfaces between people (users) and computers. Researchers in the field of HCI both observe the ways in which humans interact with computers and design technologies that let humans interact with computers in novel ways.