The First Touchscreen Was Built in 1965 — 40 Years Before the iPhone

In 1965, a British engineer named E.A. Johnson, working at the Royal Radar Establishment in Malvern, Worcestershire, published a short article in Electronic Letters describing a capacitive touch interface for a cathode ray tube display. The article was terse and technical, but its subject was startling: a screen that responded to the touch of a human finger, allowing an operator to interact with displayed information without any intermediary device like a keyboard or joystick. Johnson's primary intended application was air traffic control — a domain where operators needed to interact quickly with radar data without taking their eyes off the display to find a keyboard.

How Capacitive Touch Works

Johnson's capacitive approach to touch detection — which is also the technology in virtually every modern smartphone screen — works by detecting the change in electrical capacitance caused by a human finger approaching or contacting the surface. A capacitor is a pair of conductors separated by an insulator; touching the screen introduces a third conductor (the finger) that changes the capacitance in a measurable way. By measuring capacitance changes at different points on the screen's surface, the position of a touch can be determined.

The human body is conductive enough to function as one plate of a capacitor because it contains water and electrolytes. This is why capacitive touchscreens do not respond to ordinary objects like pens or gloved fingers — they lack sufficient conductivity. It is also why the technology had to wait for sufficiently sensitive electronics to detect the tiny capacitance changes involved before it could become practical in consumer products.

The Long Road to Consumer Technology

Johnson's work in air traffic control was refined through the 1960s and 1970s, and by the early 1970s capacitive touchscreens were installed in some UK air traffic control centers. Meanwhile, other touch technologies were being developed in parallel. The resistive touchscreen — in which two layers separated by a gap make contact when pressed, completing a circuit — was developed at CERN in 1971 by Frank Beck and Bent Stumpe. Resistive screens were cheaper to manufacture and did not require skin contact, making them suitable for industrial and medical environments where operators wore gloves.

The first consumer touchscreen products appeared in the early 1980s. Hewlett-Packard introduced the HP-150, a personal computer with a touchscreen, in 1983. The first ATM with a touchscreen interface was installed by NCR in 1986. HP's handheld computers in the late 1980s used touchscreens extensively. The technology was present in various commercial forms for decades before smartphones made it universal.

The moment that changed everything was the introduction of the iPhone in January 2007. Apple's innovation was not the touchscreen itself — it was the capacitive multi-touch screen, which could detect multiple simultaneous touch points, enabling the pinch-to-zoom and swipe gestures that made smartphone interfaces intuitive and expressive. The multi-touch technology Apple used had been developed by a small company called FingerWorks, which Apple acquired in 2005.

Why Touch Interfaces Feel Natural

The success of touchscreens at scale revealed something about human cognition: we find direct manipulation of objects more intuitive than indirect manipulation through intermediary devices. Using a mouse or keyboard requires mapping physical movements to cursor movements on a separate surface — a learned abstraction. Touching what you want to manipulate and seeing it respond directly is more aligned with how humans interact with physical objects throughout our development and lives.

This cognitive alignment is why touchscreen interfaces require less instruction for new users, particularly for basic tasks. Young children who have never used a keyboard can navigate a tablet interface intuitively. Older adults who found computers intimidating often find tablets accessible. The technology that E.A. Johnson described in a brief technical article in 1965 for air traffic controllers ultimately proved to be the key to making computing universally accessible — 40 years before that outcome could have been imagined.