From Vacuum Tubes to Artificial Intelligence: The Story of How Our Devices Evolved
Seven decades of innovation that brought technology closer to people and transformed the way we live.
EVOLUTION
José Roberto Salgado
10/4/20262 min read
Today, we carry in our pockets more computing power than would have filled an entire building less than a century ago. Understanding how we got here helps explain why technology moves the way it does: with every generation, devices have become smaller, more affordable, and more personal.
The First Machines: Massive, Expensive, and Out of Reach for Most
In the mid-20th century, computers were colossal. The ENIAC, unveiled in 1946, filled an entire room, ran on thousands of vacuum tubes, and devoured enormous amounts of power. Only governments, universities, and major institutions could afford to use them.
The big leap came in 1947 with the transistor, which replaced vacuum tubes with a component that was smaller, faster, and more efficient. In 1958, the integrated circuit arrived, packing many transistors onto a single chip. From then on, machines shrank and got cheaper year after year, at a pace that would later be captured in the famous Moore's Law.
The Computer Comes Home
The 1970s brought the first microprocessors, and with them, the personal computer. Machines like the Apple II in 1977 and the IBM PC in 1981 carried computing into offices, schools, and homes.
Soon after, the graphical interface and the mouse made it possible to use a computer without any advanced technical know-how.
Meanwhile, consumer electronics were taking off: color TVs, video games, pocket calculators, and, in 1979, the Sony Walkman, which showed the world that technology could come along with us on the move.
The Age of Portability
The 1980s and 1990s were all about portability. The first laptops hit the market, and in 1983, the Motorola DynaTAC became the first commercial cell phone: bulky and pricey, but revolutionary.
Before long, electronic organizers, digital cameras, and digital music players followed. As the internet went mainstream in the 1990s, devices stopped being standalone machines and became gateways to a global network.
The Smartphone Changes Everything
In 2001, the iPod put a thousand songs in your pocket, and in 2007, the iPhone redefined what a phone could be with its touchscreen and full web browser.
Android followed soon after, and together they turned the cell phone into an all-in-one device, absorbing what used to take separate gadgets: a camera, a music player, a map, a planner, a flashlight, and more.
In 2010, the iPad launched and made tablets popular as the happy medium between a phone and a laptop.
Everything Gets Connected
The 2010s brought devices we wear and devices that blend into our homes. Smartwatches and fitness bands began tracking our steps, sleep, and heart rate. Voice assistants and smart speakers ushered in the age of talking to our technology. The so-called Internet of Things connected appliances, cameras, light bulbs, and thermostats, while high-speed wireless connections made it all work in real time.
Where We Are Today: Intelligence Built In
Today, the spotlight is on artificial intelligence built right into the device itself. Phones, computers, and watches now handle complex tasks directly on their own chips, while new form factors emerge, from foldables and smart rings to glasses with built-in assistants. The goal is no longer just to make hardware smaller, but to make it adapt to each person.
The Journey Continues
From room-sized machines to devices we wear on our wrists, technology's journey reveals one constant: every breakthrough aimed to make life easier and information more accessible. The organizations that understand this evolution and stay ahead of it are the ones best prepared for what comes next.