Authoring systems, or authoring tools, have evolved significantly to support the creation of digital content. Early authoring systems were often proprietary and complex, requiring specialized programming knowledge. They focused on linear content delivery, like simple presentations or basic educational software. As technology advanced, authoring tools became more user-friendly and versatile. This included the rise of WYSIWYG (What You See Is What You Get) editors, allowing users to create content without coding. Multimedia integration became standard, enabling the incorporation of images, audio, and video. More recently, authoring systems have embraced interactivity and adaptive learning. They now support non-linear content, branching scenarios, simulations, and gamification. Cloud-based platforms and collaborative features are also common, facilitating teamwork and wider distribution. The focus has shifted towards creating engaging, personalized, and accessible learning experiences.