The hci full form is Human-computer interaction. Human-Computer Interaction (HCI) is an interdisciplinary branch of study that focuses on the advancement of computer technology, particularly the interaction of humans (users) with computers. HCI began with computers and has now grown to embrace nearly all aspects of information technology design.
H = Human
C = Computer
I = Interaction
The growth of personal computers in the 1980s ushered in the emergence of HCI, when machines like the IBM PC 5150, Apple Macintosh and Commodore 64 began to appear in society-altering numbers in homes and offices. For the first time, sophisticated electronic systems such as gaming gadgets, word processors, and accounting tools were made available to a wide variety of consumers.
As a result, since computers were no longer pricey room-sized equipment built only for professionals in specialized environments, the necessity for simple and effective human-computer interactions for less experienced users became increasingly important. HCI has always included a variety of fields, including cognitive science, computer science, and human factors engineering.