The DOJ dropped its 13-year IBM antitrust case the same day it broke up AT&T -- and IBM's own founder called the industry's origin myth a myth

Core claims

1. Cullinet Software's founder, on the record in 1986, called the standard "IBM unbundling created the software industry" story a myth. He argued the real cause was the early-1970s recession forcing companies to justify software spend for the first time. "That's a myth. It helped that IBM legitimized to some degree or another that software was a product... but on a scale of 10, I'd give it a 1 or 2... What really legitimized the software industry is that in the early 1970s and mid-1970s there was a tremendous economic crunch." (Oral History of John J. Cullinane, interviewed by Luanne Johnson, 1986, Computer History Museum ref. X4581.2008, pp.13-15) — source_tier: 1 (primary oral-history transcript; historical/biographical claim, uncontested).

2. The antitrust suit popularly credited with legitimizing "unbundled" software ran almost 13 years and ended in a genuine historical coincidence. Assistant Attorney General William Baxter dismissed United States v. IBM (filed 1969) as "without merit" the exact same day in January 1982 that he finalized the breakup of AT&T into seven regional carriers -- the two largest antitrust actions of the era, resolved in opposite directions, by the same official, on the same day. "In 1982 he settled a seven-year-old case against AT&T with by far the largest breakup in the history of the Sherman Antitrust Act... On that same day, he dismissed as 'without merit' a seemingly endless, thirteen-year-old suit against IBM, which had employed more than 300 lawyers and generated 2,500 depositions and 66 million pages of documents." (Reason, "The Antitrust Fraud," Oct. 1982) — source_tier: 3. The lawyer/deposition/page figures are [unverified-quant -- needs primary]: corroborated by a second Tier 3/4 source (Wikipedia, citing former FTC Commissioner Thomas B. Leary's 2002 prepared remarks) but not traced to a DOJ primary record in this session.

3. During the suit's pendency IBM's market share fell from roughly 50% (1969) to 37% (1982) -- reportedly achieved in part by IBM deliberately raising prices to look less dominant, only cutting prices again once the case was dropped. (Truth on the Market, "The Ghosts of Antitrust Past: Part 2 (IBM)," 2020) — source_tier: 3, [unverified-quant -- needs primary] for the specific share figures and the raise-then-cut sequencing.

Why this was hop-worthy

A single throwaway line in a 1986 business-computing oral history ("that's a myth") unraveled into a 13-year federal case that got resolved, by pure calendar coincidence, on the same afternoon as the AT&T breakup -- two monopoly sagas closing in opposite directions on one bureaucrat's desk.

Further leads

• DOJ v. Google (2020-2024) is explicitly framed by mainstream commentary (CBS News, "Echoes of Microsoft, IBM in Google tussle") as the same historical pattern -- checked, scored adjacent (0.637), read as confirmation rather than a fresh finding; not pursued further this chain.
• Charles Bachman / IDMS vs. the relational model rivalry -- Cullinane's IDMS product traces to Bachman's IDS at GE; a strong "person behind the thing" hook, saved but not followed (redirect favored the business/legal thread over the technical-database thread).
• Cullinane's "mandatory annual support" policy (pay 10%/year or lose the right to run the software) as an early ancestor of today's subscription/SaaS licensing -- saved, scored adjacent (0.628), genuinely interesting but a separate thread from the antitrust one.

Hop chain

Hop 1 -- Charles Babbage Institute oral histories directory -- https://cse.umn.edu/cbi/oral-histories

• Hook type: the person behind the thing
• Hook: among 550+ interviewees, John J. Cullinane -- founder of the first company (1968) formed specifically to sell software as a product, not a service -- fit the "business computing, non-AI" redirect.
• Why followed: distant-domain redirect explicitly requested; business-software-industry history is untouched territory relative to the vault's AI/ML-history center of gravity.
• Key findings: located both a 1986 (CHM) and a 2003 (CBI proper) interview; read the 1986 CHM transcript in full.

Hop 2 -- Oral History of John J. Cullinane, 1986 -- http://archive.computerhistory.org/resources/text/Oral_History/Cullinane_John/Cullinane_John_1.oral_history.1986.102658238.pdf

• Hook type: the surprising claim
• Hook: Cullinane flatly calls the standard "IBM's 1969 unbundling created the independent software industry" narrative "a myth," and offers a specific counter-cause (the early-1970s recession).
• Why followed: direct contradiction of a widely repeated origin story, from someone who lived through it as a founder -- exactly the "actually, X" pattern the hook rubric flags.
• Key findings: Cullinane dates the real shift to 1972-76, when "for the first time in the history of data processing, economic considerations started to take precedence."

Hop 3 -- AEI/Pethokoukis, "Taking a Second Look at the Idea That Antitrust Action Created the U.S. Software Industry" -- https://www.aei.org/economics/taking-a-second-look-at-the-idea-that-antitrust-action-created-the-u-s-software-industry/

• Hook type: the surprising claim (independent corroboration) / mechanism question
• Hook: economists Fisher, McKee & Manke found "no direct evidence of relation between the [unbundling] announcement and the DOJ antitrust action" -- a second, independent line of skepticism about the same myth, citing rising S/360 software costs and minicomputer competition instead.
• Why followed: wanted to check whether Cullinane's dismissal was an outlier opinion or matched the scholarly record; it matched, via a different causal mechanism.
• Key findings: the "unbundling created the industry" story is contested from at least two angles (recession-discipline vs. cost/market-structure) -- surfaced the underlying antitrust case as the next thing to check.

Hop 4 -- U.S. v. IBM case background (Truth on the Market + DOJ case history, via search) -- https://truthonthemarket.com/2020/02/03/the-ghosts-of-antitrust-past-part-2-ibm/

• Hook type: mechanism question / cultural resonance
• Hook: the case ran nearly 13 years, called "the antitrust division's Vietnam" by Robert Bork, and created a perverse incentive where IBM raised prices specifically to shrink its own market share and look less monopolistic in court.
• Why followed: zoomed into the case's internal mechanics after the causation debate raised it as background; "Vietnam" nickname and the price-raising-to-lose-share mechanism were both strong surprise signals.
• Key findings: market share fell ~50% (1969) to 37% (1982) during the suit; IBM cut prices again only after the case was dropped.

Hop 5 -- Reason, "The Antitrust Fraud," Oct. 1982 -- https://reason.com/1982/10/01/the-antitrust-fraud/ (cross-checked against Wikipedia's William Baxter entry, citing Thomas B. Leary's 2002 FTC remarks)

• Hook type: the surprising claim / the person behind the thing
• Hook: Assistant AG William Baxter dismissed the IBM case as "without merit" the same day he announced the AT&T breakup -- two era-defining antitrust actions, opposite outcomes, one man, one day.
• Why followed: zoomed out from case mechanics to the resolution's human/institutional context; the same-day coincidence is the single most surprising, most quotable fact in the whole chain.
• Key findings: confirmed via two independent sources; the IBM case had reportedly consumed 300+ lawyers, 2,500 depositions, and 66 million pages of documents by the time it was dropped.

Saved hooks not followed:

• DOJ v. Google (2020-2024) as "the new IBM case" -- from CBS News commentary and multiple 2024-2025 antitrust pieces -- interesting but already a well-worn media comparison, not a fresh finding; logged as further lead instead of a full hop.
• Charles Bachman / IDS / IDMS and the network-vs-relational database model war -- from the Cullinane transcript itself -- strong "person behind the thing" hook (Bachman won a Turing Award for IDS/IDMS-adjacent work) but a technical-database tangent, not the legal/business thread this chain committed to.
• Cullinane's mandatory annual support policy (revoke usage rights if you stop paying) -- from the same transcript -- an early ancestor of SaaS-style licensing enforcement, saved for a future chain about subscription economics.

post-worthy: maybe -- the same-day Baxter coincidence is a strong, quotable, well-corroborated (two independent Tier 3 sources) historical fact, but the chain's quantitative details (lawyer/deposition/page counts, exact market-share figures) still rest on Tier 3 sourcing and would benefit from a DOJ primary-record check before promotion.