computer science

VM Software

VM Software 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 VM Software rather than just read about it. In short: VM Software was a software company whose product line focused on mainframes running IBM's VM/CMS operating system. History VM Software was formed under that name in 1981.

Key takeaways

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

Reference excerpt

VM Software was a software company whose product line focused on mainframes running IBM's VM/CMS operating system.

History VM Software was formed under that name in 1981. They had 11 products named VMxxxxx, with features that complemented the systems-oriented capabilities that IBM's software provided. With the 1987 arrival of IBM's 9370 mid-range mainframe, VM added VMCenter II to its product line. The chain of acquisitions by which the company changed names and ownership is VM Software, Systems Center Inc, Sterling Software, Computer Associates. VM Software's mailing address, under Systems Center and Sterling remained 1800 Alexander Bell Drive but addressed as "VM Software Division."

Product summary Among their offerings were:

VMAccount - facilitating chargeback VMArchive - facilitated queue-based user-initiated saving and restoring of individual or groups of files VMBackup - intended for doing full system saves, but permitting user-initiated queued file restores. VMBatch - more features than IBM's CMSBATCH

Worked examples

Example 1 — a first encounter with VM Software

Start with the simplest possible case. Write down what VM Software 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 VM Software 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 VM Software 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 VM Software

In research: VM Software 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 VM Software 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: VM Software is common in secondary-school and first-year university syllabi. It links to neighbouring topics Defunct software companies of the United States, History of software, Software companies established in 1981, so understanding it makes those chapters shorter.
In everyday life: Look for VM Software 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 VM Software in 20 minutes

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

Frequently asked questions

What is VM Software in simple terms?

VM Software was a software company whose product line focused on mainframes running IBM's VM/CMS operating system. History VM Software was formed under that name in 1981.

Why does VM Software 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 VM Software?

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 VM Software.