• Home
  • Latest
  • Fortune 500
  • Finance
  • Tech
  • Leadership
  • Lifestyle
  • Rankings
  • Multimedia

Trendingnow

1

Mark Cuban says he has the solution to growing income inequality, and it's to reward every employee—from CEO to janitor—with company stock

2

‘I want to die broke’: Billionaire philanthropist Denny Sanford dies after giving away $4 billion

3

'Dr. Doom' Nouriel Roubini says we're headed for universal basic income or 'some form of socialism' as AI revolutionizes work—He calls that optimistic

1

Mark Cuban says he has the solution to growing income inequality, and it's to reward every employee—from CEO to janitor—with company stock

2

‘I want to die broke’: Billionaire philanthropist Denny Sanford dies after giving away $4 billion

3

'Dr. Doom' Nouriel Roubini says we're headed for universal basic income or 'some form of socialism' as AI revolutionizes work—He calls that optimistic
TechBill Gates

Bill Gates offers to let anyone download the first operating system he and Paul Allen wrote 50 years ago: ‘That code remains the coolest I’ve ever written’

By
Michael Liedtke
Michael Liedtke
and
The Associated Press
The Associated Press
Down Arrow Button Icon
By
Michael Liedtke
Michael Liedtke
and
The Associated Press
The Associated Press
Down Arrow Button Icon
April 3, 2025, 5:19 AM ET
Add Fortune on Google for similar content.

Even as he grows older, Microsoft founder Bill Gates still fondly remembers the catalytic computer code he wrote 50 years ago that opened up a new frontier in technology.

Recommended Video

Although the code that Gates printed out on a teletype machine may look crude compared to what’s powering today’s artificial intelligence platforms, it played a critical role in creating Microsoft in April 1975 — a golden anniversary that the Redmond, Washington, company will celebrate on Friday.

Gates, 69, set the stage for that jubilee with a blog post reminiscing on how he and his old high school friend — the late Paul Allen — scrambled to create the world’s first “software factory” after reading an article in the January 1975 issue of Popular Electronics magazine about the Altair 8800, a minicomputer that would be powered by a tiny chip made by the then-obscure technology company, Intel.

The article inspired Gates, who was just a freshman at Harvard University, and Allen to call Altair’s maker, Micro Instrumentation and Telemetry Systems, and promise the company’s CEO Ed Roberts they had developed software that would enable consumers to control the hardware. There was just one hitch: Gates and Allen hadn’t yet come up with the code they promised Roberts.

Gates and Allen tackled the challenge by latching onto the BASIC computer language that had been developed in 1964 at Dartmouth College, but they still had to figure out a way to make the technology compatible with the forthcoming Altair computer, even though they didn’t even have a prototype of the machine.

After spending two months working on the program with little sleep, Gates finished the code that became the basis for the Altair’s first operating system. “That code remains the coolest I’ve ever written,” Gates wrote in his blog post, which includes an option to download the original program.

The code would go on to provide the foundation for a business that would make personal computers a household staple, with a suite of software that include the Word, Excel and PowerPoint programs, as well as the Windows operating system that still powers most PCs today.

“That was the revolution,” Gates said of the code in a video accompanying his post. “That was the thing that ushered in personal computing.”

Gates’ recollection of the code is part of a nostalgic kick that he has been on this year as he prepares to turn 70 in October.

The trip down memory lane included the February release of a memoir exploring his early years as an often-misunderstood child with few friends, and a hailing of the 25th anniversary of the philanthropic foundation he created after stepping down as Microsoft’s CEO in 2000. The tech giant initially stumbled after Gates’ departure but has been thriving under CEO Satya Nadella, and has amassed a market value of about $2.8 trillion.

In his memoir, Gates also reflected on his tempestuous relationship with fellow PC pioneer, the late Apple co-founder Steve Jobs, whose company will be celebrating its golden anniversary next year.

“Fifty years is a long time,” said Gates, whose personal fortune is estimated at $108 billion. “It’s crazy that the dream came true.”

About the Authors
By Michael Liedtke
See full bioRight Arrow Button Icon
By The Associated Press
See full bioRight Arrow Button Icon
Add Fortune on Google for similar content.

Latest in Tech

Finance
Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam
By Fortune Editors
October 20, 2025
Finance
Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam
By Fortune Editors
October 20, 2025
Finance
Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam
By Fortune Editors
October 20, 2025
Finance
Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam
By Fortune Editors
October 20, 2025
Finance
Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam
By Fortune Editors
October 20, 2025
Finance
Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam
By Fortune Editors
October 20, 2025

Most Popular

Finance
Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam
By Fortune Editors
October 20, 2025
Finance
Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam
By Fortune Editors
October 20, 2025
Finance
Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam
By Fortune Editors
October 20, 2025
Finance
Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam
By Fortune Editors
October 20, 2025
Finance
Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam
By Fortune Editors
October 20, 2025
Finance
Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam
By Fortune Editors
October 20, 2025
Fortune Secondary Logo
Rankings
  • 100 Best Companies
  • Fortune 500
  • Global 500
  • Fortune 500 Europe
  • Most Powerful Women
  • World's Most Admired Companies
  • See All Rankings
  • Lists Calendar
Sections
  • Finance
  • Fortune Crypto
  • Features
  • Leadership
  • Health
  • Commentary
  • Success
  • Retail
  • Mpw
  • Tech
  • Lifestyle
  • CEO Initiative
  • Asia
  • Politics
  • Conferences
  • Europe
  • Newsletters
  • Personal Finance
  • Environment
  • Magazine
  • Education
Customer Support
  • Frequently Asked Questions
  • Customer Service Portal
  • Privacy Policy
  • Terms Of Use
  • Single Issues For Purchase
  • International Print
Commercial Services
  • Advertising
  • Fortune Brand Studio
  • Fortune Analytics
  • Fortune Conferences
  • Business Development
  • Group Subscriptions
About Us
  • About Us
  • Press Center
  • Work At Fortune
  • Terms And Conditions
  • Site Map
  • About Us
  • Press Center
  • Work At Fortune
  • Terms And Conditions
  • Site Map
  • Facebook icon
  • Twitter icon
  • LinkedIn icon
  • Instagram icon
  • Pinterest icon

Latest in Tech

$5 billion tech CEO says unemployed Gen Z should be out 3 days a week building their network: ‘Sometimes those jobs you want, they’re never published’
SuccessCareers
$5 billion tech CEO says unemployed Gen Z should be out 3 days a week building their network: ‘Sometimes those jobs you want, they’re never published’
By Orianna Rosa RoyleJuly 21, 2026
2 hours ago
A Jersey Mike's logo is displayed outside one of their stores in San Diego, California.
InvestingIPOs
Jersey Mike’s IPO valuation could reach eight times Sweetgreen’s market cap
By Sheryl EstradaJuly 21, 2026
2 hours ago
LaLiga president says tech is already making the fan experience better, and it could solve football’s money problem too
AISports
LaLiga president says tech is already making the fan experience better, and it could solve football’s money problem too
By Catherina GioinoJuly 20, 2026
12 hours ago
A 13-year-old teenage boy looks at an iPhone screen displaying various social media apps.
PoliticsSocial Media
French President Macron backs effort to ban kids under 15 from social media before departing office next year
By The Associated Press and Samuel PetrequinJuly 20, 2026
13 hours ago
Photo of Hugging Face cofounder and CEO Clement Delangue.
CybersecurityAI agents
Hugging Face says it resorted to a Chinese AI model to battle a fully autonomous cyberattack because U.S. model guardrails stymied its defense
By Emily ForliniJuly 20, 2026
14 hours ago
Sumeet Agrawal is VP of Product Management (Data, AI Governance & Context Engineering for Agentic Systems) at Salesforce.
CommentaryAI agents
Salesforce VP on the leaky AI pipeline: why cheaper tokens won’t fix enterprise AI
By Sumeet AgrawalJuly 20, 2026
19 hours ago

Most Popular

Mark Cuban says he has the solution to growing income inequality, and it's to reward every employee—from CEO to janitor—with company stock
Success
Mark Cuban says he has the solution to growing income inequality, and it's to reward every employee—from CEO to janitor—with company stock
By Sasha RogelbergJuly 20, 2026
15 hours ago
‘I want to die broke’: Billionaire philanthropist Denny Sanford dies after giving away $4 billion
Success
‘I want to die broke’: Billionaire philanthropist Denny Sanford dies after giving away $4 billion
By Sydney LakeJuly 20, 2026
19 hours ago
'Dr. Doom' Nouriel Roubini says we're headed for universal basic income or 'some form of socialism' as AI revolutionizes work—He calls that optimistic
AI
'Dr. Doom' Nouriel Roubini says we're headed for universal basic income or 'some form of socialism' as AI revolutionizes work—He calls that optimistic
By Jason MaJuly 18, 2026
2 days ago
Warren Buffett says his $147 billion investing career was an accident: ‘I may be one of the 10 luckiest in the world’
Future of Work
Warren Buffett says his $147 billion investing career was an accident: ‘I may be one of the 10 luckiest in the world’
By Sarah GlodekJuly 20, 2026
1 day ago
Current price of silver as of Monday, July 20, 2026
Personal Finance
Current price of silver as of Monday, July 20, 2026
By Joseph HostetlerJuly 20, 2026
23 hours ago
It’s not just Taco Bell lettuce and possible glass in Pillsbury rolls: Food and drink recall events reached a 6-year year-over-year high
Retail
It’s not just Taco Bell lettuce and possible glass in Pillsbury rolls: Food and drink recall events reached a 6-year year-over-year high
By Sasha RogelbergJuly 20, 2026
23 hours ago

© 2026 Fortune Media IP Limited. All Rights Reserved. Use of this site constitutes acceptance of our Terms of Use and Privacy Policy | CA Notice at Collection and Privacy Notice | Do Not Sell/Share My Personal Information
FORTUNE is a trademark of Fortune Media IP Limited, registered in the U.S. and other countries. FORTUNE may receive compensation for some links to products and services on this website. Offers may be subject to change without notice.