The NLS (oN-Line System) was an early hypertext system developed by Douglas Engelbart in the 1960s. It aimed to enhance human-computer interaction and facilitate collaborative work. NLS introduced features like text editing, file management, and the use of a mouse, which were innovative for its time. NLS was demonstrated in the famous 1968 "Mother of All Demos", showcasing its capabilities in real-time collaboration and information retrieval. This system laid the groundwork for future developments in computing, influencing the design of modern graphical user interfaces and the concept of hypertext, which is fundamental to the internet today.