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Rod Holt

Rod Holt is a computer science topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand Rod Holt rather than just read about it. In short: Frederick Rodney Holt (born 1934) is an American electrical engineer and political activist. He became the fifth employee of Apple, where he developed the power supply for the 1977 Apple II.

Rod Holt — main illustration
Rod Holt — illustration

Key takeaways

  • Rod Holt belongs to computer science; place it in that map before memorising details.
  • Learn the definition first, then one example that makes the definition concrete.
  • Connect Rod Holt to a quantity you can measure, compute or draw — that is where exam questions come from.
  • Reproduce the core statement of Rod Holt from memory before moving on to harder problems.

Reference excerpt

Frederick Rodney Holt (born 1934) is an American electrical engineer and political activist. He became the fifth employee of Apple, where he developed the power supply for the 1977 Apple II.

Early life Holt was born in 1934 to a psychiatry resident father and artist and teacher mother. He became interested in electronics by the age of 14 and taught ham radio courses for Wellesley High School by the age of 16. In 1952, after graduating from high school, Holt married his high school girlfriend Joanne. He also joined Ohio State University as a math major. He and Joanne had two children, Christine and Cheryl, during this period. Holt later stated that while at OSU, he also "became entranced with motorcycles and opened up my own motorcycle shop. That adventure failed within a year, however, and I then worked in the electronics industry to support my family. I continued to race bikes intermittently for the next twenty years." By 1958, when he was a grad student at OSU, he also became a political activist. He would later become involved in OSU's Free Speech Movement, served as editor of the Free Speech Press, and reconfigured himself as a socialist. After graduate school, he became an electrical engineer with the Hickok Electrical Instrument company in Cleveland, Ohio, and later joined Atari as an Analog Engineer.

Apple Computer

During the early development of the Apple II, Apple Inc.'s co-founder Steve Jobs asked his former boss, Atari's Al Alcorn for help with the power supply. Alcorn redirected Jobs to Holt, who saw himself as "a second-string quarterback" at Atari. He was initially "skeptical of Jobs and of Apple" (Swaine and Freiberger note that Holt "had trouble understanding the West Coast culture that shaped Apple's Founders"), telling Jobs that his rate was $200 per day. Jobs, however, replied that "we can afford you" and Holt joined co-founder and lead designer Steve Wozniak's fledgling Apple II team, in part responding to Alcorn's request to "help the kids out." Holt thus began to work "after hours at Atari on Apple's television interface and power supply." According to Apple's first CEO, Michael ("Scotty") Scott, "One thing Holt has to his credit is that he created the switching power supply that allowed us to do a very lightweight computer compared to everybody else's that used transformers." However, some sources show that over a dozen computer systems and terminals with a switching power supply came out in years prior to the Apple II, including PDP-11/20 minicomputer in 1969, Datapoint 2200 in 1970, IBM 5100 portable computer in 1975, and DECSYSTEM-20 in 1976. Holt later joined Apple full-time as Apple Employee #5. According to Holt, he was the "Chief Engineer and Vice President of Engineering during most of the reign of Apple II. I am most proud of my contributions to the floppy disk, the switching power supply, and radio interference problems. I received four patents for my work and was ennobled with the title of 'Chief Scientist'—whatever that may be. Amidst all the clamor and confusion of Apple's astonishing growth, my son Alan William was born. Six years later, after working what seemed to be sixteen-hour days and seven-day weeks, I was exiled by new management—the fourth member out of five of the original Apple team to be retired or pushed out."

2013 Jobs film

In an interview, Bill Fernandez and Daniel Kottke discussed the way in which Holt was conceptualized in the 2013 American independent film Jobs (portrayed by actor Ron Eldard). Kottke disputed the characterization, noting that: "What completely cracked us all up is the scene where Rod arrives for the first time. Rod comes up wearing leathers, riding up on a motorcycle with long hair [...] he's like this motorcycle dude. It just cracked us all up." Fernandez, who had not seen the film at the time of the interview, was also surprised by this portrayal. Holt, however, (according to Kottke), "thought it was hilarious." As for why he may have been characterized this way, Kottke states that, "Rod was really into dirt bikes. And I never saw him riding one, but he talked about it all the time. So the author just had him riding up on a motorcycle. I liked that guy. I met him on the set. I had no idea who he was when I met him because he doesn't look at all like Rod, he has long straight hair and he's wearing leathers." Fernandez, who was equally amused by this vision of Holt, responded by asking, "Who could this possibly be in the Apple universe? [...] It seems to me that there's a lot of fan fiction about Apple Computer and about Steve Jobs, and I think that this is the biggest, flashiest piece of fan fiction that there's been to date."

Further reading Hertzfeld, Andy. Revolution in the Valley: The Insanely Great Story of How the Mac was Made. O'Reilly Books, 2005. Kahney, Leander. "The Macintosh 30th Anniversary Celebration Event, January 25, 2014. Moritz, Michael. The Little Kingdom, 1984. Nieva, Richard. "Early Macintosh developer: We would have worked for free, January 25, 2014. Young, Jeffrey S. Steve Jobs: The Journey is the Reward. Glenview: Scott, Foresman and Co, 1988.

References

External links Woz and Rod Holt c. 2013. - CNET Twiggy Lives! At the Computer Museum: Happiness is a good friend – Woz and Rod Holt Mac@30 Rod Holt, Daniel Kottke and Woz discuss Early Apple, Macintosh Anniversary, January 27, 2014. Rod Holt on IMDb

Illustrations

Rod Holt illustration

Worked examples

Example 1 — a first encounter with Rod Holt

Start with the simplest possible case. Write down what Rod Holt claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In computer science, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to Rod Holt before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about Rod Holt ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of Rod Holt

In research
Rod Holt appears in computer science research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry
Engineering practice reuses Rod Holt in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom
Rod Holt is common in secondary-school and first-year university syllabi. It links to neighbouring topics 1934 births, 21st-century American engineers, Amateur radio people, so understanding it makes those chapters shorter.
In everyday life
Look for Rod Holt outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.

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How to study Rod Holt in 20 minutes

  1. Read the reference excerpt below once, without taking notes.
  2. Close the page and write down what Rod Holt means in your own words.
  3. Compare your version with the excerpt and mark what you missed.
  4. Work through the three examples above with pen and paper.
  5. Explain Rod Holt out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Rod Holt in simple terms?

Frederick Rodney Holt (born 1934) is an American electrical engineer and political activist. He became the fifth employee of Apple, where he developed the power supply for the 1977 Apple II.

Why does Rod Holt matter?

Because it connects several computer science ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study Rod Holt?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on Rod Holt.

Tags

  • 1934 births
  • 21st-century American engineers
  • Amateur radio people
  • American businesspeople in the computer industry
  • Apple Fellows
  • Apple II family
  • Apple Inc. employees
  • Atari people
  • Computer designers
  • Living people
  • Ohio State University College of Arts and Sciences alumni
  • Wellesley High School alumni

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