computer science

Tom's Guide

Tom's Guide 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 Tom's Guide rather than just read about it. In short: Tom's Guide is an American and British technology news website that primarily reviews and reports on consumer technology, produces buying guides, and publishes how-to articles. It operates out of three main offices, one in Manhattan, New York City, one in London, United Kingdom, and the other in Bath, United Kingdom.

Key takeaways

Tom's Guide 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 Tom's Guide to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of Tom's Guide from memory before moving on to harder problems.

Reference excerpt

Tom's Guide is an American and British technology news website that primarily reviews and reports on consumer technology, produces buying guides, and publishes how-to articles. It operates out of three main offices, one in Manhattan, New York City, one in London, United Kingdom, and the other in Bath, United Kingdom. Having launched as its own site in 2007, Tom's Guide is owned by UK-based Future plc.

Editorial content Tom's Guide reviews consumer technology products, grading on a five-star scale, with 1 being "very poor and among the worst products we've tested" and 5 being "best of the best and close to perfect". In addition to reviews, the site publishes buying guides, covering products its staffers have reviewed. The site also publishes news articles, "how to watch" articles, and e-commerce articles focused on personal electronics. A 2021 Digiday article reported that "a mattress buying guide on Tom's Guide sells eight mattresses a day."

Editorial independence The site stresses its editorial independence: "No outside party determines what products we review or the content of our reviews." Tom's Guide is a member of the UK-based Independent Press Standards Organisation.

Criticism In 2014, Adweek questioned the strategy of Tom's Guide's then-owner, Purch, to allow brands to buy ad pages that also included editorial reviews. This allowed companies to sponsor pages that contain editorial reviews of the company's own products.

Video game reviews On the OpenCritic hub for Tom's Guide, the publication had a 76.3 average score and 80 median score after reviewing nearly 300 video games. It recommended 82.4% of video games as of January 2025.

Readership fluctuations and article output growth Since spinning off from Tom's Hardware in 2007, Tom's Guide has regularly surpassed its former home site in audience and readership. According to a profile of the publication in Niche Pursuits, Tom's Guide received 25 million visitors a month in June 2022: "Although Tom's Guide came after [Tom's Hardware], the site's broader focus on all things consumer electronics has helped it take off to become one of the most successful affiliate sites on the planet." According to SEMRush in October 2025, Tom's Guide received 28.92 million global visits, and Tom's Hardware received 21.15 million global visits.

Readership decline Site traffic to Tom's Guide decreased by 30% between February 2023, when the site received 41.7 million visits, and October 2025, when it received nearly 29 million monthly visits.

Article volume increases The site ramped up its article production in the early 2020s:

In November 2025, Tom's Guide published more than 1,800 articles, according to its archive. In November 2020, the site published 388 articles. In November 2015, the site published 85 articles.

History and ownership Tom's Guide was launched in September 2007, a rebrand of Gear Digest and spinoff of Tom's Hardware, as a more generalist guide to consumer technology. Bestofmedia Group acquired TG Publishing in April 2007, which owned and operated Tom's Hardware, Gear Digest, and several other online media brands. In July 2013, Bestofmedia Group was acquired by TechMediaNetwork, Inc., which changed its name to Purch in April 2014. In 2015, Tom's Guide's then-owner, Purch, was profiled in Digiday for its strategy of making commerce a key part of its business. In 2014, approximately $55 million of Purch's $100 million in revenue came from e-commerce purchases, according to the Digiday. Future plc purchased Purch, which owned Tom's Guide, for $132 million in July 2018. The publication is named after Thomas Pabst, who also founded Tom's Hardware in 1996. Tom's Guide's initial focus was primarily as a "comprehensive buyer’s guide for consumer electronics and technology" according to a statement released at its launch. In years since its founding, Tom's Guide has since expanded to cover fitness, home appliances, smart home technology, streaming services, and AI, among other subjects. In December 2024, Tom's Guide owner Future plc partnered with OpenAI to give ChatGPT users access to news and lifestyle content. Tom's Guide uses an AI tool called Advisor, which leverages OpenAI's LLM, to analyze articles to suggest more articles to readers, according to Digiday report on the tool.

Editorial leadership and media appearances Tom's Guide editors have appeared regularly on cable news and local news stations over the years to speak about consumer technology products and issues. Mark Spoonauer is the global editor-in-chief for Tom's Guide, having led the publication since 2013. Prior that role he had been editor-in-chief at Laptop Magazine since 2003. Spoonauer frequently appears as a technology expert on television, having been featured on CNN, FOX 5 New York, CNBC, Fox Business, and NBC's The Today Show. Mike Prospero is the U.S. editor-in-chief, overseeing the homes, smart home, and fitness/wearables categories. He has been an expert source for Fox 5 New York on smart home technology and for Microsoft Windows 10 for CNBC. He also reviews fitness equipment for the Tom's Guide YouTube channel. Prospero has appeared on ABC World News This Morning while employed by Fast Company.

Other notable staff members Jeff Parsons is the UK editor-in-chief, and Kate Kozuch is managing editor for social media and video. Kozuch is a frequent guest on Cheddar to discuss CES, and Apple AirPods and Apple Intelligence. Jane McGuire, Tom's Guide's fitness editor, was previously an editor at Runner's World. John Velasco, senior channel editor for phones, is a frequent guest expert on News 12 New Jersey.

Masthead The Tom's Guide masthead lists 51 staff members and four contributing writers.

Social media As of December 2025, Tom's Guide has more than 406,000 followers TikTok, and 115,000 subscribers on YouTube. Tom's Guide was an early participant in Snapchat's Dynamic Stories software, which automatically created Snapchat content based on information in a publisher's RSS feed.

Awards The Webby Awards recognized Tom's Guide with a 2025 Honoree award for its video review of the Apple Vision Pro.

… excerpt ends here. Continue reading the full article.

Worked examples

Example 1 — a first encounter with Tom's Guide

Start with the simplest possible case. Write down what Tom's Guide 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 Tom's Guide 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 Tom's Guide 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 Tom's Guide

In research: Tom's Guide 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 Tom's Guide 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: Tom's Guide is common in secondary-school and first-year university syllabi. It links to neighbouring topics American technology news websites, Computer magazines published in the United States, Computing websites, so understanding it makes those chapters shorter.
In everyday life: Look for Tom's Guide 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 Tom's Guide in 20 minutes

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

Frequently asked questions

What is Tom's Guide in simple terms?

Why does Tom's Guide 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 Tom's Guide?

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 Tom's Guide.