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Xylogics

Xylogics 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 Xylogics rather than just read about it. In short: Xylogics, Inc., formerly Xylogic Systems, Inc., was an American computer company independently active from 1971 to 1995. Originally headquartered in Needham, Massachusetts, the company produced a variety of hardware products for minicomputers, initially focusing on typesetting and word processing workstations based on DEC computers.

Xylogics — main illustration
Xylogics — illustration

Key takeaways

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

Reference excerpt

Xylogics, Inc., formerly Xylogic Systems, Inc., was an American computer company independently active from 1971 to 1995. Originally headquartered in Needham, Massachusetts, the company produced a variety of hardware products for minicomputers, initially focusing on typesetting and word processing workstations based on DEC computers. The company also specialized in the design of disk controllers and networking hardware and software. The company was acquired by Bay Networks in 1995.

History

Xylogics was founded in 1971 by three former NASA employees: Laurence Liebson, Robert Bushkoff and Stephen Rotman. The company was originally named Xynetic Systems, but this name was already in use by a California company, so the group in Needham, Massachusetts, changed their name in late 1971 to Xylogic Systems. Their original business was the design and development of computerized newspaper typesetting and editing systems. The first system was developed for the Daytona Beach News Journal, with Farmington, New Mexico's Farmington Daily Times getting the second system. By 1972, Xylogics had grown to more than 15 people, and moved to Natick, Massachusetts. The company used the GRI minicomputer, and custom designed many circuit boards to support disk drives, paper tape punches and readers, and automatic capture of newswire service feeds. By 1974, the company had developed a CRT editing station, and offered systems of up to 4 computers and more than 50 terminals for newspaper or in-plant publishing to perform editing and typesetting. About this time, a second division was created to design and build disk controllers for DEC computers, derived in part from the successful designs and manufacturing capability developed for the newspaper business. In 1976, a major customer of Xylogics, Dymo Graphics Systems, purchased the newspaper product line and hired most of the original developers. Dymo Graphics, of Wilmington, MA was the first company to develop laser technology for typesetting applications. Dymo Graphic Systems combined its typesetting equipment business with the Xylogics editing systems, and by 1978 had over 100 turnkey typesetting systems in use worldwide. The Xylogic Systems typesetting capability was the first with WYSIWYG (What You See Is What You Get) printing capability for Tabloid size page layout, and later full page layout. Capability included on-line classified ad capture with automated pricing, in addition to full page markup and typesetting. In 1977, Dymo was purchased by Eselte Corporation, who wanted control of the highly successful "Dymo Label Maker" consumer product. Eselte sold the newspaper and typesetting business to ITEK Corporation in 1978, who wanted the laser technology IP. ITEK declined support to the newspaper and typesetting business, and in 1979, the newspaper product development and manufacturing staff of 150 engineers, technicians, assemblers, and field support personnel had dwindled to 2 by January 1980. Xylogics continued building disk and other controllers for DEC hardware. They also built serial terminal servers from 4-port to 72-port units under the product name Annex. Xylogics was acquired by Bay Networks in December 1995 which in turn was acquired by Nortel in June 1998. After Nortel's bankruptcy in 2009, support for the remaining Annex products ended up with Avaya. Xylogics was located in Burlington, Massachusetts. The Multibus based Xylogics 450 SMD and Xylogics 451 ESMD disk controllers along with Interphase Multibus SMD disk controllers were significant to the workstation and minicomputer industry during the 1980s as a low cost interface the low cost, high performance, high capacity SMD and ESMD disk drives available at the time. Sun-1, Sun-2 and Sun-3 servers and Silicon Graphics IRIS, HP/Apollo all used Xylogics 450 and 451 disk controllers.

References

Illustrations

Xylogics: Xylogics Multibus 450 SMD Disk Controller Board
Xylogics Multibus 450 SMD Disk Controller Board

Worked examples

Example 1 — a first encounter with Xylogics

Start with the simplest possible case. Write down what Xylogics 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 Xylogics 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 Xylogics 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 Xylogics

In research
Xylogics 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 Xylogics 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
Xylogics is common in secondary-school and first-year university syllabi. It links to neighbouring topics 1971 establishments in Massachusetts, 1995 disestablishments in Massachusetts, American companies disestablished in 1995, so understanding it makes those chapters shorter.
In everyday life
Look for Xylogics 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 Xylogics in 20 minutes

  1. Read the reference excerpt below once, without taking notes.
  2. Close the page and write down what Xylogics 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 Xylogics out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Xylogics in simple terms?

Xylogics, Inc., formerly Xylogic Systems, Inc., was an American computer company independently active from 1971 to 1995. Originally headquartered in Needham, Massachusetts, the company produced a variety of hardware products for minicomputers, initially focusing on typesetting and word processing w…

Why does Xylogics 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 Xylogics?

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 Xylogics.

Tags

  • 1971 establishments in Massachusetts
  • 1995 disestablishments in Massachusetts
  • American companies disestablished in 1995
  • American companies established in 1971
  • Computer buses
  • Computer companies disestablished in 1995
  • Computer companies established in 1971
  • Computer storage devices
  • Defunct computer companies based in Massachusetts
  • Defunct computer companies of the United States
  • Defunct computer hardware companies
  • Defunct networking companies

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