computer science

Sealevel Systems

Sealevel Systems 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 Sealevel Systems rather than just read about it. In short: Sealevel Systems, Inc. is a privately held manufacturer headquartered in Liberty, South Carolina, which develops computer circuit I/O boards. Company overview Sealevel Systems was founded by Tom O’Hanlan and his wife Susan, in 1986.

Key takeaways

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

Reference excerpt

Sealevel Systems, Inc. is a privately held manufacturer headquartered in Liberty, South Carolina, which develops computer circuit I/O boards.

Company overview Sealevel Systems was founded by Tom O’Hanlan and his wife Susan, in 1986. In 1991 the company released a dual port serial card that allowed users to set its I/O addresses to any two COM ports. In 1994, Sealevel developed the RS-485 auto-enabled circuit. The circuit eliminated the need to control the RS-485 transceiver-enable signal via software and removed the risk of communications error due to bus communications. In 1997, O’Hanlan was granted a patent for a communication device that transmitted asynchronous formatted data synchronously. The company produced the communications card used for positioning the Space Shuttle's robotic arm in 2002. Tom O’Hanlan and technical author Jon Titus co-authored a book, The Digital I/O Handbook, in 2004. In 2005, Sealevel Systems released the industry's first RoHS-compliant serial I/O board. In 2008, Sealevel won a defense contract for a USB/serial port cable with a heavily encased circuit board. The cable allows soldiers in the field to link laptops to AN/PRC-117F Multiband Manpack Radio (MBMMR) tactical radios, manufactured by any company, and transmit data, including GPS maps, images, coordinates and IM-type communications via radio signal instead of by satellite. It took seven years for the company to perfect the technology. In 2013 the company was awarded a sole-source contract for Naval Air Systems Command for this cable.

References

Worked examples

Example 1 — a first encounter with Sealevel Systems

Start with the simplest possible case. Write down what Sealevel Systems 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 Sealevel Systems 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 Sealevel Systems 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 Sealevel Systems

In research: Sealevel Systems 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 Sealevel Systems 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: Sealevel Systems is common in secondary-school and first-year university syllabi. It links to neighbouring topics Companies based in South Carolina, Companies established in 1986, Computer companies of the United States, so understanding it makes those chapters shorter.
In everyday life: Look for Sealevel Systems 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 Sealevel Systems in 20 minutes

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

Frequently asked questions

What is Sealevel Systems in simple terms?

Sealevel Systems, Inc. is a privately held manufacturer headquartered in Liberty, South Carolina, which develops computer circuit I/O boards. Company overview Sealevel Systems was founded by Tom O’Hanlan and his wife Susan, in 1986.

Why does Sealevel Systems 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 Sealevel Systems?

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 Sealevel Systems.