Welcome back to Input Origins, your monthly time-travel through the famous, the forgotten, and the unsung input methods. This month: the Trackpad — the unassuming surface that sits on EVERY laptop. It was invented thirty years too early, faded into obscurity, then got adopted in a single quarter the moment the world was ready. And its evolution? Mutated into the screen of the first iPhone.
Series editor: Ariel Amar
The Trackball Had to Die
By the early 1990s, the personal computer revolution was in full swing. Laptops were going mainstream, the graphical interface had become the default, and the mouse was suddenly the wrong shape for a portable machine. Manufacturers tried trackballs (Input Origins #15) .
They worked, sort of. Trackballs made laptops too thick, picked up dust and finger oil like a lint roller, and jammed at the worst moments. By 1993, every laptop maker on the planet was scrambling for a better answer.
A 1994 Cirque Glidepoint Trackpad
1987: Seven Years of 'Maybe Later'
Sometimes a brilliant invention shows up too early for the party, languishes in the shadows, and dies just before its time. This nearly happened to the Cirque trackpad. In 1987, Dr. George E. Gerpheide invented the zero-force "capacitive shunt" touchpad in his basement — a grid that read your finger as a dent in its electric field. He co-founded Cirque Corporation in Salt Lake City in 1991 to commercialize it as GlidePoint. For years, he schlepped suitcase-sized prototypes to trade shows.
Laptops weren't yet mainstream. The graphical interface wasn't the norm. His pitch fell on deaf ears. The breakthrough came in May 1994, when Apple licensed GlidePoint for the Apple PowerBook 500 — the first Apple laptop with a trackpad!
Fredrico Faggin - The inventor of the first CPU and the Synaptics Touchpad
1986: From Neural Networks to Touchpads
Meanwhile, a parallel story had been quietly unfolding. In 1986, two Silicon Valley legends — Federico Faggin, who invented the first CPU (the intel 4004), and Carver Mead, who coined "neuromorphic computing" — co-founded Synaptics, originally to build neural network chips that mimicked human sensory perception. The chips turned out to be even better at sensing actual humans. They pivoted; by 1992 they had a capacitive laptop touchpad prototype.
The commercial breakthrough came in 1994 when Windows OEMs like the Epson ActionNote and Twinhead laptops adopted their TouchPad. That was the same year as Cirque's Apple PowerBook 500 launch. By the end of the year, the trackball was history.
Elias & Westerman, co-founders of FingerWorks
Sixty Years of Trackpad Trivia
As a historical footnote: long before the trackpad went mainstream in 1994, the very first commercial trackpad arrived in 1980. The high-end Xerox 860 word-processing workstation shipped with an optional circular touchpad called the CAT — short for Capacitance-Activated Transducer, and almost certainly a wink at the Mouse. It didn't catch on. To trace the absolute earliest origins, finger-driven capacitive touch goes all the way back to 1965 — read about it in Input Origins #13.
Another footnote: the multi-touch technology that made the iPhone possible was an evolution of the trackpad. In 1998, FingerWorks built the first consumer multi-touch trackpad — pinch, swipe, the whole vocabulary that would feel iconic a decade later. Apple acquired the company in 2005 and put the same grid under glass. Three years later, it sat under the screen of the 2007 iPhone — and a year after that, under the glass of the 2008 MacBook Pro's trackpad, enabling more complex gesture control.
When the Trackpad Disappears...
Look at the 40-year arc of the trackpad and one pattern stands out: the surface keeps shrinking. A circular pad on a desk in 1980. A palm-rest slab on a laptop in 1994. A pane of glass on a phone in 2007.
So what happens when that arc reaches its conclusion? When we no longer need the surface to move, no longer need it to physically click, no longer even need a surface to touch — our own hands simply become the touchpad. Will the next generation of computing simply read the electrical impulses of our wrists directly?
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