Pioneer of human-machine interface

When we talk about interacting with a computer today, we rarely think about what is behind this process. In fact, the entire history of computing is the history of the search for a common language between man and machine. Human-machine interface went from bulky switches to touch screens, and it wasn't an easy path. One of the first researchers to recognize the need to simplify this interaction was Douglas Engelbart.

His contribution cannot be overestimated, because it is thanks to his inventions that we use the mouse for navigation today. However, before the advent of graphical interfaces, working with a computer resembled a complex ritual, accessible only to a narrow circle of specialists. Engineering thought had to make the leap to make the computer a tool for everyone. This required not just technical changes, but also a deep understanding of user psychology.

At the beginning of the computer era, only a select few had access to computing power. Programmers and operators communicated with the machine in the language of zeros and ones, using punch cards and complex console commands. Interactivity in the modern understanding was absent as a class. Efficiency work was low, and the entry threshold was prohibitively high. It was in this atmosphere that a concept was born that would later turn the world upside down.

⚠️ Warning: Early computers took up entire rooms, but their interface was more primitive than that of a modern calculator. Don’t think that powerful hardware back then meant ease of use.

It cannot be denied that without the fundamental discoveries of that time, we would still be writing programs on paper cards. Technological progress in the field of interfaces has made it possible to democratize access to information. Today, even a child can intuitively understand how to launch an application on a tablet. But this was not always the case, and the path to this lay through years of experimentation.

The Birth of the Concept of Interactivity

In the 1960s, the batch processing model dominated. The user gave a stack of punched cards to the operator and waited for the result for hours, and sometimes days. Interactive mode work, when a machine reacts to human actions in real time, seemed fantastic. Douglas Engelbart, while working at the Ames Research Center, began to develop systems that allow the operator to directly influence the progress of calculations.

The key point was the understanding that the computer should help a person solve complex problems, and not just perform arithmetic operations. This required creating an environment where information exchange occurs continuously. Hypertext and networking also originated in the depths of these laboratories. This was the time when the very philosophy of the digital age was being formed.

One of the main problems of that time was the low bandwidth of communication channels between the operator and the computer. Telegraph printers could not provide the required speed. Therefore, the introduction of video terminals was a revolutionary step. Data visualization on the screen allowed operators to instantly evaluate the results of their work and make adjustments.

It is important to note that the first systems did not have a graphical interface in the form we are familiar with. Everything was controlled by text commands that had to be memorized. Syntax The team was strict and did not forgive mistakes. An error in one character could cause the entire program to crash. This required users to be highly skilled and attentive.

• 🖥️ The transition from punch cards to video terminals has significantly speeded up data exchange.
• 🔗 The emergence of the first networks allowed several users to work with one machine at the same time.
• 💡 The concept of “intelligence amplification” has become the main goal of interface developers.

Developers of that time were looking for ways to make cars more “understandable.” Feedback has become a key element of the new system design. The machine had to inform the user about its status, the progress of tasks and errors. Without this, effective cooperation was impossible.

Invention of the computer mouse

The most famous invention associated with the name of Engelbart is, of course, the computer mouse. In 1964, he and engineer Bill English created the first prototype of this device. It was a wooden block with two metal wheels that track movement. Positioning device was supposed to be an alternative to inconvenient joysticks and light pens.

Why a mouse? Because it allowed you to naturally point to objects on the screen. Grid on the display required a precise navigation tool. Previous attempts to use light pens tired the operator's hand, as it was necessary to constantly keep it suspended. The mouse rested on the table surface, which reduced fatigue.

Signals from the wheels were converted into changes in X and Y coordinates on the screen.

The first models were connected to the computer through a special port and required calibration. Mechanical link provided sufficient accuracy for that time. Later, in the 1980s, the company Logitech and other manufacturers will improve the design by adding a ball mechanism, and then optical sensors. But the principle remains the same.

For a long time, the mouse remained a niche device, used only in research centers. The general public only learned about it after the famous presentation in 1968, known as the "Mother of All Demonstrations." GUI, windows and hyperlinks were shown to the world right then. This event marked a turning point in the history of computing.

Interestingly, Engelbart himself did not aggressively patent the mouse, believing that the technology should be available to everyone for development. The patent expired long before the mouse became the de facto standard. This allowed many companies to create their own versions of the device, improving its design and functionality.