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On January 10th, 1985, Sir Clive Sinclair, the knighted millionaire behind the pocket calculator and the ZX Spectrum, unveiled what he believed was the future of transport at Alexandra Palace in London. It was a three-wheeled, open-air electric vehicle that looked like a plastic bathtub. This episode follows the Sinclair C5 from his long obsession with electric vehicles, through his sale of about 8.3 million pounds in personal shares to fund a secretive new company, to a launch in snow and ice that journalists turned into a public humiliation.

The root of the trouble was a 1983 UK legal category, the electrically assisted pedal cycle, which required no license, insurance, road tax, or helmet. To qualify, the C5 could weigh no more than 60 kilograms, use no more than a 250 watt motor, and travel no faster than 15 miles per hour. Sinclair designed for the loophole instead of the commuter, with almost no market research. The collapse took eight months, yet the unsold stock found a strange afterlife, and the idea itself now looks decades early.

• The C5 ran on a standard lead acid battery and a motor originally designed to drive a truck cooling fan, and it was assembled in a Hoover washing machine factory in Wales.
• At the launch, cold cut the advertised 20 mile range to around five, and racing driver Stirling Moss was reduced to pedaling uphill amid diesel fumes.
• The British Safety Council chairman said he was shattered that 14-year-olds could drive it in traffic without a license, insurance, or a helmet.
• Production ended by August 1985 with about 5,000 of 14,000 units sold, and Sinclair lost seven million pounds of his own fortune.
• Liquidated C5s bought for as little as 75 pounds became collector's items, and one modified example ran at 150 miles per hour.

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Starting in November 2008, the Conficker worm, also known as Downadup or Kido, infiltrated somewhere between 9 and 15 million computers. It grounded French military aircraft that could not download flight plans, turned up on Royal Navy warships and submarines, and infected over 800 computers in Sheffield hospitals. Its entry point was a Windows flaw cataloged as MS08-067, which Microsoft had patched on October 23rd, 2008. By January 2009 an estimated 30 percent of Windows PCs were still unpatched, and a second variant spread through USB drives and the AutoRun feature.

This episode follows the contest between the worm's authors and an industry coalition that came to be called the Conficker Cabal, which included Microsoft, Symantec, ICANN, and academic researchers. The malware blocked security tools, signed its updates with RSA cryptography, and generated 250 domains a day to look for orders. When defenders locked those domains down, it escalated. Then, with the world braced for catastrophe, the giant botnet delivered a payload so small that it changes how the whole story reads.

• The name Conficker is a near-perfect anagram of parts of trafficconverter.biz, a domain the worm contacted for updates, with an extra K added.
• Manchester City Council estimated 1.5 million pounds in disruption and banned all portable USB drives.
• Within weeks of academics publishing a corrected MD6 hashing algorithm, the worm's authors had built it into their code.
• Variant D raised the daily domain count from 250 to 50,000 across 110 top level domains and added a peer-to-peer update network.
• In April 2009, Variant E installed the Waledac spam bot and scareware called SpyProtect 2009, then deleted itself. Half a million machines were still infected in 2019.

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The blue screen of death was not designed by psychologists to calm anyone down. When Windows NT 3.1 introduced the first true critical error screen in 1993, Microsoft developer John Vert wrote it to match what he already stared at all day: a MIPS workstation and the SlickEdit text editor, which defaulted to white text on a blue background. This episode traces the screen from the garbled text of Windows 1.01 and 2.03, through the blue task manager summoned by Control-Alt-Delete in Windows 3.1, to the stop error that halts everything.

That halt is a protective act. Windows 95, 98, and Millennium Edition let programs and the core system share memory and offered to continue after an error, which rarely ended well. Windows NT isolated the kernel and, when something went wrong inside it, stopped cold to keep corruption off the hard drive while dumping memory for engineers. The episode also covers the hexadecimal codes, the sad face introduced with Windows 8, the QR code of Windows 10, and the black screen announced for Windows 11 version 24H2 after the CrowdStrike outage of July 2024.

• In 2014, tech outlets misread a Raymond Chen blog post and credited Steve Ballmer with inventing the crash screen. Ballmer had only written the text for the Windows 3.1 task manager dialog.
• Chen clarified that he himself created the Windows 95 version of the error screen.
• At Comdex in 1998, a scanner plugged in by Chris Capossela crashed a Windows 98 beta in front of Bill Gates, who joked that this must be why it was not shipping yet.
• On Windows 95 and 98, a path using the reserved DOS device name con twice could crash the machine, and malicious websites hid it in their pages.
• Windows Insider builds crash to a green screen, and the Linux software suite systemd has added its own blue screen for critical boot failures.

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On certain legacy servers, the date is still counted as a day in September 1993. The joke commemorates Eternal September, the moment between late 1993 and early 1994 when the early internet lost its small town feel. This episode reconstructs Usenet before the flood: a network of newsgroups reached mostly through universities and tech companies, passed between machines over phone lines by UUCP, where every byte cost someone money. That expense produced netiquette, enforced by flaming, kill files, and complaints to a newcomer's system administrator.

Each September a wave of college freshmen disrupted the newsgroups, and by November they had either learned the rules or left. Then commercial providers such as Delphi and America Online offered access to anyone with a modem and a credit card. AOL opened its Usenet gateway in March 1994, and the newcomers never stopped arriving. The veterans' own posts record the birth of the phrase, and the episode connects their dilemma to open source maintainers now swamped by AI-generated pull requests.

• Quoting an entire 50-line post just to agree was a cardinal sin, since it forced servers around the world to pay to transmit it.
• In January 1994, Joel Furr asked two folklore newsgroups whether Delphi had unleashed a staggering amount of weirdos on the net.
• On January 25, 1994, David Fisher wrote that September 1993 would go down in net history as the September that never ended.
• A Unix script called sdate reports the date as an ever-growing day count in September 1993, and a free public Usenet server runs at eternal-september.org.
• In 2026, GitHub invoked Eternal September to describe the flood of AI-assisted pull requests overwhelming volunteer maintainers.

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Most of the looping clips people send today are not GIF files at all. They are silent video files wearing an old disguise. This episode tells the story of the real Graphics Interchange Format, released in June 1987 by a CompuServe team led by Steve Wilhite, when customers paid by the minute and a single color image could take minutes to arrive. The solution was a palette of 256 colors chosen from roughly 16.7 million, LZW compression that built a shared dictionary of patterns on the fly, and interlacing that let users see a rough image early and abort a wrong download.

The 1989 update added transparency and multiple frames, and in 1995 Netscape Navigator 2.0 made those frames loop forever. Then Unisys realized the compression algorithm was covered by its patent and began demanding licensing fees, provoking protests and the creation of a free alternative. The format outlived the patents and a long fight over its pronunciation, even as social platforms quietly replaced the files themselves with far smaller video.

• Limiting images to 256 colors matched the hardware of 1987, when graphics cards rarely displayed more than that at once.
• A true color hack split photos into 16 by 16 pixel blocks, each a separate frame with its own palette, which some browsers then flashed tile by tile.
• In 1999, Unisys said some non-commercial site owners could owe $5,000 to $7,500, prompting Burn All GIFs Day.
• PNG was developed in 1995 with the open deflate algorithm to avoid the patent, which expired between 2003 and 2004.
• Wilhite used his 2013 Webby Awards lifetime achievement speech to flash a message that it is pronounced with a soft G, like the peanut butter.

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Projectionists running 70 millimeter IMAX prints, some weighing over 600 pounds, control the film platters through software that imitates a handheld device from 1997. This episode explains how that came to be by going back to March 10, 1997, when Palm, then a subsidiary of U.S. Robotics, launched the PalmPilot Personal at $299 and the PalmPilot Professional at $399. Inside was a 16 megahertz Motorola processor, Palm OS 2.0, and either 512 kilobytes or one megabyte of memory, all running for weeks on two AAA batteries.

Those limits forced ruthless efficiency. Where rivals poured money into natural handwriting recognition that slow chips could not handle, Palm asked users to learn Graffiti, a set of simplified single-stroke letters the device could read instantly. The company also treated early buyers with unusual respect, and by 1998 it had reportedly sold over a million units. The same static, predictable interface is why IMAX engineers later rebuilt it as a simulator for a job where a stray swipe on a modern touchscreen could be costly.

• The PalmPilot weighed 5.6 ounces, measured 4.7 by 3.1 inches, and had a monochrome screen of 160 by 160 pixels.
• Graffiti reversed the usual approach: it trained the human to write for the computer, as with an A drawn like an upside-down V.
• Syncing with the desktop meant an RS-232 serial connection, and getting online required a separate $129 modem running at 14.4 kilobits per second.
• Owners of the earlier Pilot 1000 and 5000 could buy a $199 upgrade kit, or $99 for registered users, with a new memory card, a ROM chip, and a plastic door that added infrared.
• IMAX quick turn reel units were originally operated with physical PalmPilots, and the simulator preserved the interface for releases like Oppenheimer.

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Google and Facebook spend fortunes on cybersecurity, yet a single Lithuanian fraudster took $100 million from the two of them over two years. He used no exploit at all. He impersonated a hardware supplier both companies worked with, mocked up official letterheads, sent fake invoices, and was paid. This episode treats that case as the entry point to social engineering, the practice of attacking the human instead of the code, and explains why it is cheaper, faster, and more reliable for an attacker than hunting for a software flaw.

The tactics each press on a hardwired trait. Pretexting builds false legitimacy from scraped personal details. Scareware goes straight for panic. Tailgating turns politeness at a secure door into a breach, while baiting and waterholing let curiosity and habit do the work. The history runs from phone phreakers such as Kevin Mitnick and Susan Headley to the RSA breach, the Sony Pictures leak, and the phishing of John Podesta in 2016. The law has tried to catch up, but no statute can patch curiosity, empathy, or fear.

• In a 2016 University of Illinois study, 290 of 297 USB drives dropped around campus were picked up, and 135 were plugged in and opened.
• The Badir brothers, three siblings in Israel who were blind from birth, ran an extensive telecommunications fraud scheme in the 1990s using voice impersonation.
• The 2011 RSA hack began with emails to four employees carrying a spreadsheet titled 2011 recruitment plan.
• Ubiquiti Networks lost nearly $47 million in 2015 to a spear-phishing email posing as an executive, recovering about $8 million.
• Within 24 hours of Equifax launching its breach response site, attackers registered 194 lookalike domains built on typing errors.

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HD DVD reached stores first, cost less to manufacture, had Microsoft behind it, and carried no region codes. It still ended with Toshiba abandoning the format and absorbing a loss of $986 million. This episode goes back to the problem both camps were trying to solve: high-definition televisions fed by 480p DVDs that topped out around eight and a half gigabytes. Shuji Nakamura's practical blue laser diode, with its 405 nanometer wavelength, made denser discs possible, and the DVD Forum promptly split over how to use it.

Sony and Philips pushed a radical new design that became Blu-ray. Toshiba and NEC proposed keeping the DVD's physical structure so that pressing plants could be modified instead of scrapped. Merger talks collapsed in 2005, partly over Java versus Microsoft's iHD for interactive menus. Toshiba launched in spring 2006 and fought on price, but capacity and studio alliances mattered more. A copy protection fiasco, confused shoppers, and one studio's decision brought the war to a sudden end in early 2008.

• Blu-ray held 25 gigabytes on a single layer and 50 on a dual layer, against 15 and 30 for HD DVD.
• In November 2006, Microsoft sold an HD DVD add-on drive for the Xbox 360 at $199, bundled with Peter Jackson's King Kong.
• Hackers scraped an AACS processing key from computer memory, and the takedown notices that followed led users on Digg and Wikipedia to repost the code everywhere, even on T-shirts.
• Warner Brothers announced it was going Blu-ray exclusive on January 4th, 2008, and Netflix, Best Buy, and Walmart quickly turned away from HD DVD.
• Toshiba surrendered on February 19th, 2008, and Warner later let owners mail in sleeve art plus $4.95 for a Blu-ray replacement.

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The floppy disk was declared obsolete well over a decade ago, yet it coordinated functions of the United States nuclear forces until 2019 and loaded flight software onto British Airways Boeing 747s until that fleet retired in 2020. This episode starts in 1971, when IBM introduced an eight-inch, read-only disk for loading microcode into mainframes, and follows the format as it shrank to the 5.25-inch mini-floppy from Shugart Associates in 1976 and then to the rigid 3.5-inch design, based on a Sony format, that became the universal save icon.

Along the way come the mechanical details that made the disk both clever and doomed: fabric liners that wiped the surface as it spun, a read head that dragged directly across the iron oxide, and stepper motors that limited how tightly data could be packed. Users answered with hole punchers and power drills. Apple answered with variable speed motors. When software outgrew 1.44 megabytes, the Zip disk and the LS-120 SuperDisk tried to save the format before USB flash drives ended the contest.

• Users punched a notch in single-sided 5.25-inch disks to make flippy disks, since factories coated both sides with iron oxide anyway.
• Early Macintosh drives slowed the motor at the outer tracks and sped it up near the center, storing 400 and later 800 kilobytes where PCs managed 360 or 720.
• Steve Wozniak's Apple II disk controller dropped the track zero sensor, so the drive slammed the head against a metal stop, producing its famous clacking.
• Apple's 1998 iMac G3 shipped with no floppy drive, and Dell stopped including them as standard equipment by 2003.
• A 2016 Government Accountability Office report found nuclear command and control running on eight-inch disks in IBM Series/1 computers, and Japan required floppy submissions for some documents until 2024.

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The fax machine is older than the telephone. Scottish inventor Alexander Bain received a British patent in 1843 for his electric printing telegraph, and by 1865 Giovanni Caselli's pantelegraph was running a commercial service between Paris and Lyon, 11 years before Alexander Graham Bell's invention. This episode traces how synchronized pendulums, copper plates, and insulating ink turned images into electrical pulses, and why bankers and lawyers prized the result: a signature they could see, not a name tapped out in Morse code.

The story moves through radio facsimile in the 1920s, a failed home radio newspaper in the 1930s, satellite and police uses, and the walled gardens of the 1970s, when rival machines could not talk to each other. A 1980 standard and a clever compression scheme made the fax the lifeblood of business in the 1980s and 1990s. The harder question is why it survives now. The answers run through Japanese hanko stamps, American privacy law, legal precedent on signatures, and a sense of security that no longer matches how fax calls actually travel.

• In 1924, RCA designer Richard H. Ranger sent a photograph of President Calvin Coolidge from New York to London by radio, and Herbert E. Ives of AT&T transmitted a color fax of Rudolph Valentino using three separations.
• Xerox's 1966 Magnafax Telecopier weighed 46 pounds and connected to a telephone through an acoustic coupler.
• The screech of a fax call is a negotiation that opens with a 1,100 hertz calling tone, then settles speed, resolution, and compression.
• Modified Huffman coding sent instructions describing runs of white and black pixels, cutting transmission to about 40 seconds a page.
• During the pandemic, Berlin districts reported zero new COVID cases for days because health department fax machines were overwhelmed and ran out of paper.