Human Computer Interaction

Human computer interaction is the study of the interaction between user and computers includes planning and design. It is often regarded as the intersection of computer science, behavioral sciences. a computer has many affordances for use and this takes place in an open-ended dialog between the user and the computer. Human computer interaction is also sometimes referred to as man- machine . it help people for computer using such us building interfaces of computer program for programmer.

Human computer interaction studies a human and a machine, it supporting knowledge on both. On the machine side includes techniques in computer graphics, operating systems, programming languages etc. On the human side includes communication theory, industrial design disciplines, social sciences etc.

Human machine interaction is important because the design of human machine interfaces is must be understand with user and poorly designed human machine interfaces can lead to many unexpected problems. The information between the human and computer is defined as the loop of interaction. The loop of interaction includes:

• Task environment: The goal set by the user.
• Machine environment: The environment of computer
• Input: The flow of information that begins in the task environment, when the user has some task that requires using their computer.
• Output: The information that gained from machine process or business process.
• Feedback: is the dialogue of interface that evaluate, confirm processes from the human through the interface to the computer and user. 

Human machine interaction is improving the interactions between users and computers.

• Methodologies for designing interfaces
• Methods for implementing interfaces
• Techniques for evaluating interfaces
• Developing interfaces and interaction techniques