In 1997, IBM scientists with the power to arrange individual atoms built a working calculator at the nanoscale, and the design they chose was an abacus. This episode asks why a tool thousands of years old still looked like the right answer. The word itself traces back to a Semitic term for dust or sand, a reminder that the first version was a table strewn with fine grit where merchants drew lines and set pebbles. The Sumerians were using boards and counters in a base 60 system between 2700 and 2300

For three centuries, engineers did their hardest arithmetic on a stick with no batteries and no buttons. The slide rule, nicknamed the slipstick in the United States, works because multiplying two numbers is the same as adding their logarithms: slide one logarithmic scale along another and the product appears under the hairline. This episode explains the mechanics and the history, from Edmund Gunter's fixed scale in the 1620s to the moment William Oughtred set two of them side by side and let them

On the morning of August 1, 2012, Knight Capital Group was the largest trader in U.S. equities, handling more than $21 billion a day and holding about 17 percent of volume on both the New York Stock Exchange and the Nasdaq. Forty-five minutes after the opening bell it had lost $440 million. This episode reconstructs how a routine software update, copied by hand to seven of eight servers, destroyed a firm founded in 1995 and built over 17 years.The cause was old code nobody had deleted. To support a

Around the turn of the millennium, millions of people downloaded a free desktop companion that told jokes, sang songs, recited trivia, and managed downloads. BonziBuddy, from Joe and Jay Bonzi's Bonzi Software, launched in 1999 as a green parrot named Peedy, a stock character from the Microsoft Agent technology the whole program was built on. In May 2000 the parrot gave way to Bonzi, a purple gorilla with a synthetic voice labeled Adult Male #2. This episode follows how a virtual pet became what one

In 2005, a Craigslist ad offered women $100 to upload videos of themselves to a struggling dating site modeled on Hot or Not. Nobody bit. The site was YouTube, founded by former PayPal employees Chad Hurley, Jawed Karim, and Steve Chen, and its servers sat nearly empty until the founders dropped the dating angle and let people post anything. This episode traces how that pivot produced a platform with over 2.7 billion monthly users, more than a billion hours watched each day, and 500 hours of video

A plastic whistle from a box of Cap'n Crunch cereal happened to blow at exactly 2,600 hertz, the tone AT&T used to mark a long distance trunk line as idle. Because the phone company sent its control signals down the same channel as callers' voices, anyone who could reproduce that tone could take over the network. John Draper, born in 1943 to an Air Force engineer, learned the trick in 1969 from a circle of blind teenage phone phreaks and then engineered the blue box, a tone generator that

On July 1, 1970, Xerox chief scientist Jack Goldman founded the Palo Alto Research Center, placing it 3,000 miles from the copier company's East Coast headquarters. Bob Taylor filled its computer science lab with engineers leaving the nearby Stanford Research Institute as government funding dried up. In under a decade that team produced bitmap graphics, the graphical user interface, the Bravo what you see is what you get editor, Smalltalk and object-oriented programming, Ethernet, and the laser

In 1979, Brigham Young University graduate student Bruce Bastian and computer science professor Alan Ashton wrote a word processor for a Data General minicomputer owned by the city of Orem, Utah, and kept the rights. Their company, Satellite Software International, moved the program to the IBM PC in 1982, and because no C compiler existed for the machine, they wrote it entirely in x86 assembly language. That forced choice made WordPerfect faster than WordStar and, by 1990, the owner of 60 percent of

Teachers and librarians once warned that a website anyone could edit was where facts went to die. Two decades later, federal courts cite it and scientific journals ask authors to update it. This episode goes back to the year 2000 and Nupedia, a slow, expert-reviewed encyclopedia that demanded credentials and a multi-step peer review. In January 2001, Jimmy Wales and Larry Sanger launched Wikipedia as a feeder project, a public scratch pad for rough drafts. The scratch pad swallowed the encyclopedia

In the early 1870s, British portrait photographer Harry Pointer posed his cats roller skating and sitting at tiny tea tables, then printed joke captions beneath them on souvenir cards people traded in their parlors. This episode argues that his Brighton Cats series holds the full DNA of the internet meme, and follows the idea across 150 years to the lolcat: a cat photo stamped with blocky white text in a deliberately broken dialect. The format is sillier than it looks and more rule-bound than anyone

More than a decade before the World Wide Web, two graduate students, Tom Truscott and Jim Ellis, linked Unix machines at Duke and the University of North Carolina over ordinary phone lines. Locked out of the government-funded ARPANET, they used the UUCP protocol and late-night modem calls to pass messages from server to server, a store and forward design that worked like a digital bucket brigade. This episode tells how that poor man's ARPANET became the first global town square, with no CEO, no

In January 2026, someone cleaning out a closet at the University of Utah found a nine-track magnetic tape holding a surviving copy of Unix version 4. This episode treats that discovery as the opening of a biography: the life of an operating system that began as an unsanctioned project at Bell Labs in the late 1960s. Ken Thompson, Dennis Ritchie, Doug McIlroy, and Joe Ossanna had grown tired of Multics, the overbuilt time-sharing system from MIT, Bell Labs, and General Electric, and retreated to a

In 1995, connecting a printer, modem, or joystick to a PC meant a tangle of parallel ports, serial ports, PS/2 plugs, and game ports, plus driver floppies and hand-assigned IRQ channels that crashed the machine when two devices collided. Seven companies, Intel, Microsoft, IBM, Compaq, DEC, NEC, and Nortel, set out to replace all of it with one plug and play, hot-swappable port that carried its own power. This episode traces the Universal Serial Bus from that fix to the cable that now runs nearly

In 2007, David Karp and Marco Arment built Tumblr in a two-week gap between consulting contracts, and it gained 75,000 users in two weeks. By 2011, half its users were under 25. With no public follower counts and a tag field that people filled with rambling private commentary, it became a haven for niche communities, especially LGBTQ youth. In May 2013, Yahoo bought it for 1.1 billion dollars in cash. Six years later it sold for less than 3 million.This episode traces how that value vanished. Yahoo

The transistor is the most manufactured artifact in human history: by 2018, more than 13 sextillion had been made. It replaced the thermionic triode, a glass vacuum tube invented in 1907 that had to boil electrons off a heated plate, ran hot, and burned out like a light bulb. Physicist Julius Edgar Lilienfeld patented a solid-state alternative in Canada in 1925, but the pure semiconductor crystals needed to build it did not exist. The breakthrough came at Bell Labs in December 1947.This episode

Before the transistor, a portable radio was a heavy box of hot, fragile vacuum tubes that needed two separate batteries, one just to heat the filaments. That changed after December 1947, when William Shockley, Walter Brattain, and John Bardeen demonstrated the first working transistor at Bell Laboratories. The first commercial transistor radio, the Regency TR-1, arrived in November 1954 from an unlikely partnership between Texas Instruments and an Indianapolis maker of TV antenna boosters. It cost

In 1991, a 13-year-old Tom Fulp cut and pasted together a fanzine about the Neo Geo console called New Ground and mailed it to about 100 members of a Prodigy club. By 1995 he had moved the idea online, and as a Drexel University student he began making crude games such as Club a Seal and Assassin. In 1999 he released Pico's School, a Flash game far more polished than the web of that era was used to, and gathered his scattered projects under a single domain with a page he called the Portal.This

The Pirate Bay began in late 2003 as a project of Piratbyrån, a Swedish anti-copyright think tank whose name means the Piracy Bureau. Its founders, Fredrik Neij, Gottfrid Svartholm, and Peter Sunde, described it as a long-running piece of performance art. The site hosted no movies or music at all. Using the BitTorrent protocol, it worked like a card catalog for an empty library, pointing users to one another's files. Early servers and bandwidth were paid for in part by Carl Lundström, heir to a

Around 1990, German researcher Karlheinz Brandenburg sat in a lab listening to Suzanne Vega's a cappella recording of Tom's Diner thousands of times. He was tuning an algorithm built on a quirk of human hearing called auditory masking, first documented in 1894 by physicist Alfred M. Mayer: a loud tone makes a quieter neighboring tone inaudible. Brandenburg's idea, finalized in his 1989 doctoral thesis, was that a computer need not store sounds the brain throws away.This episode traces the MP3 from

Stuxnet was the first malware found to spy on and sabotage industrial control systems, and the first to carry a rootkit for a programmable logic controller. It surfaced in June 2010 after a programming error in an update let it spread from an engineer's laptop to the open internet, where a researcher at the Belarusian antivirus firm VirusBlokAda flagged it. At half a megabyte, it was enormous for malware. It used four zero-day exploits at once and drivers signed with keys stolen from Realtek and