Human–computer interaction

Human-computer interaction (often shortened to HCI) is a field of computer science that looks at the ways in which a human uses a computer and interacts with it. The focus in human-computer interaction is in the design of interactive systems, and in the user interfaces by which the human interacts.

Computer science
Hardware	Printed circuit board Peripheral Integrated circuit Systems on Chip (SoCs) Very Large Scale Integration Energy consumption (Green computing) Electronic design automation Hardware acceleration
Computer systems organization	Computer architecture Embedded system Real-time computing Dependability
Networks	Network architecture Network protocol Network components Network scheduler Network performance evaluation Network service
Software organization	Interpreter Middleware Virtual machine Operating system Software quality
Software notations and tools	Programming paradigm Programming language Compiler Domain-specific language Modeling language Software framework Integrated development environment Software configuration management Software library Software repository
Software development	Control variable Software development process Requirements analysis Software design Software construction Software deployment Software engineering Software maintenance Programming team Open-source model
Theory of computation	Model of computation Formal language Automata theory Computability theory Computational complexity theory Logic Semantics
Algorithms	Algorithm design Analysis of algorithms Algorithmic efficiency Randomized algorithm Computational geometry
Mathematics of computing	Discrete mathematics Probability Statistics Mathematical software Information theory Mathematical analysis Numerical analysis Theoretical computer science
Information systems	Database management system Information storage systems Enterprise information system Social information systems Geographic information system Decision support system Process control system Multimedia information system Data mining Digital library Computing platform Digital marketing World Wide Web Information retrieval
Security	Cryptography Formal methods Security hacker Security services Intrusion detection system Hardware security Network security Information security Application security
Human–computer interaction	Interaction design Social computing Ubiquitous computing Visualization Accessibility
Concurrency	Concurrent computing Parallel computing Distributed computing Multithreading Multiprocessing
Artificial intelligence	Natural language processing Computer vision Search methodology Control method Knowledge representation and reasoning Automated planning and scheduling Philosophy of artificial intelligence Distributed artificial intelligence
Machine learning	Supervised learning Reinforcement learning Unsupervised learning Multi-task learning Cross-validation
Graphics	Animation Graphics processing unit Virtual reality Rendering Photograph manipulation Mixed reality Image compression Solid modeling
Applied computing	E-commerce Computational chemistry Computational biology Digital art Video games Word processing Quantum Computing Enterprise software Computational mathematics Computational physics Computational social science Computational engineering Differentiable computing Computational healthcare Electronic publishing Cyberwarfare Electronic voting Operations research Educational technology Document management

A woman teaching girls in Afghanistan how to use computers. Human use of computers is a major focus of the field of HCI.

Electrodes are used for speech recognition.

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