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Leonard Kleinrock with ARPANET

Chapter 5

The Internet

Notable Innovators

CH 5 Notables Early Internet

Early Internet

Leonard Kleinrock

Leonard Kleinrock

BRIEF BIO

Leonard Kleinrock was born on June 13, 1934, in New York City. He is an American computer scientist who developed the mathematical theory behind packet switching and who sent the first message between two computers on a network that was a precursor of the Internet. Kleinrock received a bachelor's degree in electrical engineering from the City College of New York in 1957, then earned both a master's degree in 1959 and a doctorate in 1963 in electrical engineering from the Massachusetts Institute of Technology. At MIT, surrounded by many computers, Kleinrock realized that they would eventually have to interact with each other in a network — and that the existing mathematical descriptions of communication networks would be inadequate for describing future computer networks with many nodes. For his doctoral thesis, Kleinrock extended the mathematical discipline of queuing theory to such networks, making the simplifying assumption that allowed him to predict how computer networks would perform, providing a mathematical description of packet switching — in which each data stream is broken into discrete, easily conveyed packets. Kleinrock became a professor of engineering at the University of California, Los Angeles, in 1963, where he has remained a central figure in computer science for over six decades.

ACCOMPLISHMENTS

Kleinrock pioneered the mathematical theory of packet networks — the technology underpinning the Internet — and his laboratory's UCLA host computer became the first ARPANET node in September 1969. On October 29, 1969, Kleinrock and his student Charley Kline sent the first message over ARPANET to a computer at Stanford Research Institute in Menlo Park, California. The message was intended to be the word "login," but the connection crashed after the letter "o," making the first ARPANET message simply "lo." Kleinrock managed the software team at UCLA — including Steve Crocker, Jon Postel, and Vint Cerf — who developed the host-to-host protocol for the ARPANET, the Network Control Program. His theoretical work on hierarchical routing with student Farouk Kamoun remains critical to the operation of the Internet today. Kleinrock chaired a National Research Council committee that produced the landmark report Toward a National Research Network in 1988, which called for a single high-speed network to connect fragmentary computer networks. Senator Al Gore championed the report, and in 1991 the High Performance Computing Act was passed, making federal funding available for high-speed networks. He has published over 250 papers and authored six books on subjects including packet switching networks, packet radio networks, local area networks, broadband networks, nomadic computing, and peer-to-peer networks.

IMPACT

Kleinrock has reflected on the moment with characteristic humility: "When we sent that first message, there weren't any reporters, cameras, tape recorders or scribes to document that major event. We knew we were creating an important new technology that we expected would be of use to a segment of the population, but we had no idea how truly momentous an event it was." He foretold the future of the internet with striking accuracy, telling the Daily Bruin that "It will become a pervasive global nervous system. Everywhere you go the internet will be available, and it will be invisible." The honors that have followed reflect the magnitude of his contributions. Among his accolades are the 2007 National Medal of Science — the highest honor for achievement in science bestowed by the President of the United States — the L.M. Ericsson Prize, the Marconi Prize, the Okawa Prize, the NAE Charles Stark Draper Prize, and the BBVA Frontiers of Knowledge Award. In 2024, Kleinrock was elected to the National Academy of Sciences and received the IEEE Computer Society Computer Pioneer Award for his groundbreaking contributions to computer networking. He was honored with the Charles Stark Draper Award as one of the fathers of the Internet, alongside Vinton Cerf, Robert Kahn, and Larry Roberts — a recognition that places him squarely among the handful of individuals most responsible for shaping the connected world we inhabit today.

CH 5 Notables Connection

Connection

Mark Andreeson

Marc Andreessen

BRIEF BIO

Marc Andreessen was born on July 9, 1971, in Cedar Falls, Iowa. He is an American software engineer who played a key role in creating the web browser Mosaic and who co-founded Netscape Communications Corporation. As an undergraduate at the University of Illinois at Urbana-Champaign, he worked at the university's National Center for Supercomputing Applications (NCSA), where he became familiar with Tim Berners-Lee's open standards for the World Wide Web. He and a co-worker, Eric Bina, created a user-friendly browser with integrated graphics that would work on a wide range of computers — the resulting code was the Mosaic web browser. After graduating in 1993, Andreessen headed to Silicon Valley, where he was soon contacted by James Clark, the founder and former president of Silicon Graphics. In April 1994, the duo founded Mosaic Communications Corporation — later rechristened Netscape Communications — and Andreessen recruited the original masterminds behind Mosaic to build the "monster" browser they initially dubbed Mozilla, meaning "Mosaic Killer." It was commercially launched as Netscape Navigator and became the most popular browser on the web, capturing over 75 percent of market share by mid-1996.

ACCOMPLISHMENTS

According to some estimates, Mosaic stimulated a 10,000 percent increase in the number of web users within two years of its debut, and Netscape Navigator was even more popular — together representing perhaps the single most dramatic acceleration in internet adoption in history. The Netscape IPO in August 1995 was one of the largest in the history of technology to that point, touching off the dot-com boom and making Andreessen one of the youngest leading entrepreneurs in Silicon Valley. After Netscape was acquired by AOL for $4.2 billion, Andreessen co-founded Loudcloud — a pioneer in cloud computing — which was later renamed Opsware and sold to Hewlett-Packard for $1.6 billion in 2007. He also co-founded the social networking platform Ning. In 2009, Andreessen and longtime business partner Ben Horowitz established the venture capital firm Andreessen Horowitz — known as a16z — which grew into one of the most prominent investment firms in Silicon Valley, backing Facebook, Twitter, Airbnb, Skype, GitHub, Coinbase, and OpenAI. He also authored the influential 2011 essay "Why Software Is Eating the World," which argued that software companies were poised to disrupt and dominate large sectors of the global economy.

IMPACT

Marc Andreessen's career spans the development of the graphical web browser, the commercialization of the internet, the rise of cloud computing, the growth of social networking, and the emergence of venture capital as a dominant force in the technology industry. His co-creation of Mosaic and co-founding of Netscape placed him at the center of the pivotal moment when the internet transformed from an academic tool into a mass medium. By following the unlikely strategy of making Netscape Navigator a free download, Andreessen helped establish the principle that browser software — and eventually many internet services — could be offered at no cost to consumers, a model that shaped the entire business architecture of the web. Andreessen and Ben Horowitz were ranked number one on CNET's 2011 list of most influential investors, reflecting how thoroughly a16z reshaped the venture capital landscape by treating founders as partners rather than just recipients of capital. His "Software is Eating the World" thesis has proven remarkably prescient — nearly every major industry from finance to healthcare to transportation has since been fundamentally disrupted by software-driven companies, validating a framework that now serves as a foundational lens through which Silicon Valley understands technological change.

CH 5 Notables Engagement

Engagement

Steve Chen

Steve Chen

BRIEF BIO

Steve Chen was born on August 18, 1978, in Taipei, Taiwan. At the age of eight, he emigrated to the United States with his family, settling in Illinois. He completed his schooling there — including three years at the Illinois Mathematics and Science Academy in Aurora, a specialized school for gifted students — and went on to earn a degree in computer science from the University of Illinois at Urbana-Champaign. When his classmates at the University of Illinois went on to found companies like PayPal, Chen left school to work for them, joining as one of the company's earliest employees. He worked at PayPal as a software developer from 1999 until 2005, gaining a reputation for delivering code quickly through unorthodox but effective shortcuts. While working at PayPal, Chen regularly met up with Chad Hurley and Jawed Karim to discuss new technology ideas and business strategies over pizza. It was at one of these gatherings in 2005 that the YouTube concept was first conceived. He also had a brief stint at Facebook for several months in 2005 before fully committing to the YouTube venture.

ACCOMPLISHMENTS

When Chen, Hurley, and Karim left PayPal to start YouTube, it wasn't even clear that the nascent broadband infrastructure could support playing video in a browser. In just 18 months, YouTube went from idea to cultural force occupying 30 percent of internet traffic. Within just months of its beta release in May 2005, YouTube was attracting around 30,000 viewers daily. Six months after its official launch, this number had grown to over two million viewers per day, and by March 2006 YouTube hosted over 25 million videos with approximately 20,000 new uploads every day. Chen was instrumental in building YouTube into a viral video phenomenon. As the company's key technologist, he is credited with developing the company's massive data centers and helping build YouTube into a premier entertainment destination. In October 2006, about 20 months after YouTube's founding, Google acquired the startup for $1.65 billion in stock. Chen's approximate one-fifth stake earned him around $326 million personally. Chen was named one of Time Magazine's "Most Influential People" in 2007, and was also recognized in Business 2.0's "50 Most Influential People" and GQ's "Men of the Year."

IMPACT

YouTube quickly became the world's leading video-sharing platform and, as YouTube's chief technology officer, Chen played a crucial role in navigating the platform's early copyright challenges and developing partnerships with major media companies. As one of the original architects of the world's largest video-sharing platform, Chen helped create what is now the single most influential online video destination in history — and as an influential member of the "PayPal Mafia," he is part of the most consequential network of entrepreneurs Silicon Valley has ever produced, a group whose alumni went on to found and fund companies including Tesla, SpaceX, LinkedIn, and Facebook. From an original limit of 160 characters in text, media communications have become increasingly rich, and YouTube was central to that transformation — shifting the internet from a text-and-image medium to one dominated by video. Chen's story is also a powerful example of the contribution of immigrants to American technology: arriving in Chicago at the age of eight, Chen earned money working at 7-Eleven that helped him go to college, before going on to co-build one of the most visited websites on earth and permanently transforming how billions of people consume, create, and share information.

CH 5 Notables Arts & Culture

Arts & Culture

Miyamoto

Shigeru Miyamoto

BRIEF BIO

Shigeru Miyamoto was born in Sonobe-cho, Kyoto, Japan, on November 16, 1952. As a young boy, he loved to draw, paint pictures, and explore the landscape surrounding his home. Stories describe his fascinated discovery of hidden caves, lakes, and other natural features that would later influence his creative work. He originally sought a career as a manga artist, until developing an interest in video games. With the help of his father, he joined Nintendo in 1977 after impressing then-president Hiroshi Yamauchi with his toys. He was assigned to rescue the unsold Radar Scope cabinets, which had been a commercial failure in America. Yamauchi called Miyamoto into his office, as he was the only staff member available at the time. The resulting arcade game, Donkey Kong, was a colossal success and the game's lead character — then known only as "Jumpman" — would later become Nintendo's mascot, Mario. Miyamoto rapidly became Nintendo's star producer, was given his own team — R&D 4, later known as Nintendo EAD — and built a large stable of franchises for the company, most of which are still active and well-regarded today.

ACCOMPLISHMENTS

While developing Donkey Kong, Miyamoto prioritized story development over technical and programming aspects — marking the first such instance in video game development. Miyamoto is the author of the Mario Bros. series, which has become one of the most marketed sagas in history with sales of 900 million units worldwide. He has designed over a hundred games, some of which — Mario Bros. and Zelda — are considered the best in the history of video games. Critics have specifically defined The Legend of Zelda: Ocarina of Time as "the best video game ever made." His game Super Mario 64 defined the field of 3D game design, particularly with its use of a dynamic camera system and analog control, while Ocarina of Time's gameplay introduced features such as a target lock system and context-sensitive buttons that have since become common elements in 3D adventure games. In 2019, Miyamoto was awarded Japan's Person of Cultural Merit for his contributions to the video game industry, making him the first person in the industry to receive this honor. He also received the BAFTA Fellowship in 2010, the Game Developers Choice Lifetime Achievement Award in 2007, the Prince of Asturias Award in 2012, and was the first inductee into the AIAS Hall of Fame in 1998.

IMPACT

Miyamoto's first big hit, Donkey Kong, helped create the platform game genre. Super Mario Bros. set the standard for all future video games and helped save the video game industry after a big crash in 1983. The Legend of Zelda was one of the first open-world games and introduced saving games with battery backup. Super Mario 64 defined how 3D games should be designed, and The Legend of Zelda: Ocarina of Time introduced features like target locking that are still used today. Celebrated as the "Steven Spielberg of gaming," he is often called the father of modern video games thanks to his sustained and significant impact on the industry. The BAFTA Fellowship jury noted that with previous honorees including Hitchcock, Kubrick, and Pinter, it was "only fitting that Miyamoto be recognized alongside these other pioneers for his groundbreaking work." Games featuring his creations have sold over a billion copies. As of 2023, The Super Mario Bros. Movie grossed $1.347 billion worldwide, becoming the third-highest-grossing animated movie of all time and the highest-grossing film based on a video game. Miyamoto's insistence that games should be joyful, surprising, and driven by player discovery — rather than technical complexity alone — established a philosophy of design that shaped not just Nintendo but the entire global games industry.

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