Then, computers were only accessible to highly professional academics (or maybe a couple of wealthy hobbyists). When it was finally made available to the mass public, complex steps to get things done through the computer had to be easy. The interface between users and computers is key to facilitating interaction between these two groups to achieve specific goals.
According to Interaction Design Foundation, HCI is a broad field which overlaps with areas such as user-centred design (UCD), user interface (UI) design and user experience (UX) design. In many ways, HCI was the forerunner to UX design.
Before we get to that, let’s do a quick rundown of the timeline of HCI evolution with the availability of new technologies.