Why “The Langenkamp Dictionary”?

The choice of name is a small act of continuity. This page explains the lineage so the choice is not mysterious.

Robert Darwin Langenkamp (b. 1914)

My grandfather, Robert Darwin Langenkamp, was an Oklahoma oilman who spent his working life in and around the petroleum industry. He worked at Gulf Oil and ultimately became editor of Gulf Oil’s monthly publication, The Orange Disc. My grandmother seems to have seen, with practical clarity, that a man who had spent a career inside the industry — and who had spent that career paying close attention to its language — was in a position to write the reference book the industry needed.

In 1974, he wrote the first edition of the Handbook of Oil Industry Terms & Phrases, published by The Petroleum Publishing Company of Tulsa, the Lauinger-family-owned publisher of the Oil & Gas Journal and predecessor to PennWell. New editions followed in 1977, 1981, 1984, and 1994. These were not passive reprints. My grandfather kept updating the dictionary and proposing new editions to PennWell, partly because the language of the industry kept changing and partly, more practically, because new editions helped renew sales and royalties. The book was a working reference — written for people who needed to use the language of the oilfield, not for marketing departments — and it became a small standard for several decades.

What stuck with the family was less the commercial life of the book than the impulse behind it: that an industry’s working terminology deserves to be written down clearly by someone who actually understands it, made affordable, and made available to the next generation of practitioners.

There was also a family version of the same impulse. After I graduated from George Washington University and moved to Colorado for my first banking job, I lived for a time with my grandfather after my grandmother had died. After dinner, we played a game with the enormous household dictionary. One of us would open the book at random and read words aloud. The other had to define each word until we reached one he did not know. Then the reader supplied the definition and handed over the dictionary. The game reversed, and the testing began again.

It was a simple game, but a good one. Random page: humility. Definition: memory and wit. Failure: learning. Passing the dictionary across the table: reciprocity.

Robert Dobie Langenkamp (1936–2023)

My father, Robert Dobie Langenkamp, picked up that work and carried it forward. He was born in Tulsa in August 1936, in the middle of Oklahoma’s great Dust Bowl heat wave; as he likes to say, he arrived on the hottest recorded day in Oklahoma history. Many decades later, he co-authored the 6th edition of the Handbook of Oil Industry Terms & Phrases (PennWell), updating his father’s foundation with terms and concepts that had entered the industry in the intervening decades.

His own career sat at the intersection of oil-and-gas practice, law, and policy:

His career took the work of a single industry handbook and extended it into international energy law and policy across multiple decades and continents.

The Voices of Oklahoma oral-history project recorded an interview with him in 2020 — audio and transcript available here — a primary source for anyone who wants the longer biography in his own words.

Why a dictionary, again, two generations later?

I am the third Langenkamp in this line of work, in a different industry. After a brief start in banking in the United States, I began my working life in earnest in Taiwan, as a translator and project manager for a small company trying to sell military vehicles. From there I moved into the brewing industry in China during one of its great growth phases, then into international investment banking in Hong Kong, before eventually running a security business in New Zealand. Most of my career, in other words, took place outside the United States. The pandemic brought me back when I found, quite literally, that I could not return to New Zealand; one may take that as a sign from God, or at least as a fairly forceful career nudge. Since 2022 I have been teaching strategy and international management at the University of Massachusetts Amherst. My current research focus is the analysis of equipment auctions and, more recently, the operational practice of agentic AI in higher education.

Agentic AI in 2026 has the same problem oil-and-gas had in 1974: a flood of new terminology, mostly issued by vendors with an interest in keeping the language murky, and not enough working references written by people who actually use the systems day-to-day. My senior colleagues, my students, and my own future-self deserve a clearer reference than the one currently available in trade press and product launches.

The Langenkamp Dictionary of Agentic AI Terminology is the result. It is a free, openly licensed, working glossary, written in the same spirit as my grandfather’s handbook: short entries, honest definitions, no marketing copy, no axe to grind, no charge.

Different industry. Same impulse.

The Landman moment

Taylor Sheridan’s Landman (Paramount+, 2024–) has given a wider audience a fresh dose of oilfield vocabulary: leases, royalties, pumpjacks, mineral rights, wildcatters, and the practical language of an industry most people encounter only indirectly. That language did not come from nowhere. It belongs to a working world with its own history, risks, jokes, and hard-won precision — the kind of world my grandfather’s handbook tried to make legible.

That is the connection worth noting here. A dictionary is not just a list of words. It is a record of a working culture learning to explain itself. Oil and gas needed that in the twentieth century. Agentic AI needs it now.

A note on tone

The dictionary itself is restrained — no flourishes, no marketing prose, just terms and what they mean. This page is the one place where a little family pride is allowed. That seems like a fair trade.

Maintained by Matthew D. Langenkamp / 雷邁德. Dictionary entries: entries/. Topic index: topics.md.

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