In 1966, during a lengthy family road trip, Roger Summit retrieved a tape recorder and began dictating his thoughts about a concept he had been contemplating at work.
As a research scientist at Lockheed Missiles and Space Company, Mr. Summit described a computer system that would enable users to remotely and nearly instantly search extensive collections of scientific and technical literature.
Rather than visiting a library and manually searching card catalogs, researchers could simply type their queries into a computer and instantly receive a list of the documents they required on their screens.
“I recognized the transformative potential of computer‑based information retrieval systems for research,” Mr. Summit recalled in 2019, adding, “there is little value in knowledge that cannot be located.”
While driving, he elaborated on the possibilities, speaking into the recorder for several hours as his infant daughter cried in the back seat. By the time he arrived home, he had coined a name for his concept.
“The system was intended to be interactive between human and machine,” he later explained. “The user would state, ‘This is what I want,’ and the computer would respond, ‘This is what I have.’ In that sense, why not name it Dialog?”
Under his leadership, a Lockheed team developed Dialog into a commercial product, which many view as one of the earliest online search services—predating Google, Yahoo and AltaVista by more than twenty years.
Mr. Summit passed away on June 7 after being struck by a car near his Los Altos Hills, California, home. He was 95, and his death, though not widely publicized, was confirmed by his family.
Although Mr. Summit never achieved widespread fame in computing, his concepts foreshadowed the way billions of people now browse the internet and interact with AI chatbots.
“Roger is one of the key founding figures in search,” internet historian Marc Weber noted in an interview, “and Dialog was indeed present at the very start.”
Motivated by his conviction that technology should serve humanity, Mr. Summit began considering a system like Dialog in the early 1960s, after his Lockheed colleagues joked that it was easier to repeat research than to locate existing work.
“The problem resembles the search for Ali Baba,” Mr. Summit wrote in the *Journal of Information Science* in 1979, “you suspect he is hidden in one of many empty jars, and the sheer number makes the effort seem futile.”
Using Dialog was comparable to using a modern search engine, albeit in a more primitive form; computer terminals connected via telephone lines to databases containing millions of article and report references.
In 1967, Lockheed performed a proof‑of‑concept test with NASA, linking Dialog to a database of over 250,000 documents. Scientists and librarians were astonished that queries which previously required hours could now be answered in minutes.
“This is my first, brief attempt to use you, you monster,” a NASA scientist wrote in his Dialog evaluation, “and the results are excellent.”
Another commented, “I cannot overstate the tremendous assistance this system provides, both in labor and time. Thank you.”
There was, however, a single dissenting opinion.
The only complaint, Mr. Summit recalled in 2002, came from a librarian who said demand for her services had grown so much that she had to truncate her coffee break. “We were thrilled beyond words.”
Roger Kent Summit was born on October 14, 1930, in Detroit.
At age 11, his teacher parents sent him to a self‑realization retreat in Pasadena, California, where he first encountered mountains, deserts and beaches. The experience left a lasting impression, and in 1948 he returned to California to study psychology at Stanford University.
One afternoon in his senior year, his girlfriend asked, “Do you know there’s a new thing called a computer?”
He replied, “No.”
“We spent a great deal of time discussing computers, and I became fascinated,” he said in a 2003 interview with *Information Today*.
After graduating in 1952, he served as a communications officer in the Navy aboard the aircraft carrier *Valley Forge*. While there, he discussed computers with a fellow officer, who suggested that Mr. Summit purchase stock in Texas Instruments.
Unfamiliar with stocks or the burgeoning computing industry, he chose to pursue an M.B.A. after his naval service ended in 1955, again enrolling at Stanford, where he attended one of the university’s earliest computer‑science seminars.
Following business school, he entered Stanford’s doctoral program in management science and later joined Lockheed as a summer intern in the information‑processing group.
“That’s what launched this entire information journey,” Mr. Summit remarked in 2003.
After the 1967 NASA test succeeded, Lockheed secured contracts to deploy Dialog at the U.S. Atomic Energy Commission, the European Space Research Organization, and other government agencies.
In 1972, Lockheed brought Dialog to the commercial market, offering remote access to scientific and information databases for libraries, law firms, news outlets and universities.
Lockheed sold Dialog to newspaper conglomerate Knight Ridder for $353 million in 1988. The service has changed hands several times and is now owned by Clarivate, a British information‑services firm.
Mr. Summit married Virginia Buckhorn in 1964; she survives him, together with their children, Scott and Jennifer Summit.
In 2005, Google invited Mr. Summit to speak about the early days of online search. Opening his presentation, he asked, “How many people have heard of Dialog?”
Fewer than half of the audience raised their hands.
Mr. Summit was not disheartened; he recognized that Dialog represented only an early milestone in digital history and marveled at Google’s capabilities.
“The retrieval speed,” he said, “is beyond my imagination.”
