Explain the following in the context of HCI: (i) Optical Scanner, and Headphones (ii) Graphical User Interfaces (iii) Hypertext

Human-Computer Interaction (HCI) focuses on the design and use of computer technology, emphasizing the interfaces between users (humans) and computers. Effective HCI aims to make interactions intuitive, efficient, and satisfying. In this context, several technologies play critical roles in shaping user experiences. Here, we explore the roles of optical scanners, headphones, graphical user interfaces, and hypertext in HCI.

(i) Optical Scanner and Headphones

Optical Scanner: An optical scanner is a hardware device that converts physical documents or images into digital formats. It operates by scanning an object, typically a document or a photograph, and using ______ _____ _____ ______ ________ ______ _______ ___ _______ ______ ___.
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