computer science

Pacbase

Pacbase 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 Pacbase rather than just read about it. In short: IBM VisualAge Pacbase is a code-switching structured programming language that is developed and maintained by IBM. VisualAge Pacbase runs on both IBM and non-IBM mainframes and integrates with IBM WebSphere Studio Application Developer.

Key takeaways

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

Reference excerpt

IBM VisualAge Pacbase is a code-switching structured programming language that is developed and maintained by IBM. VisualAge Pacbase runs on both IBM and non-IBM mainframes and integrates with IBM WebSphere Studio Application Developer. When compiling Pacbase code it is first translated into COBOL and then compiled to binary. PACBASE was an early advanced computer-aided software engineering (CASE) software for mainframes and Unix systems from CGI (Compagnie Générale d'Informatique, a French software house) that supported a wide variety of databases, including DB2 and Oracle. PACBASE generated COBOL code for the servers, and Visual Age for PACBASE was used to create the client side. IBM purchased CGI in the early 1990s and absorbed the code-generating tools into its other offerings. Pacbase is now considered a legacy system; its main remaining use is in Francophone markets. IBM supported Pacbase through 2015. More details on the French page of VisualAge Pacbase.

References

External links IBM VisualAge Pacbase Overview PCMAG Definition of PACBASE Archived 2012-10-12 at the Wayback Machine European Users Club of VisualAge Pacbase PTF is an HP offer, complete and highly automated processing transforming Pacbase into structured COBOL RPPz : replacement solution for VisualAge Pacbase from IBM Raincode Labs PACBASE Migration: an automated service to convert PACBASE systems to maintainable native COBOL PTF - Program Transformation Factory: Euraxiel (founded by CGI Systems experts) and HP have partnered to offer an end-to-end fully automated PACBASE to maintainable native COBOL transformation service

Worked examples

Example 1 — a first encounter with Pacbase

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

In research: Pacbase 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 Pacbase 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: Pacbase is common in secondary-school and first-year university syllabi. It links to neighbouring topics Fourth-generation programming languages, IBM mainframe software, IBM software, so understanding it makes those chapters shorter.
In everyday life: Look for Pacbase 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.

Affiliate

Preply — study more efficiently by working with a personal tutor. 50% off.

How to study Pacbase in 20 minutes

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

Frequently asked questions

What is Pacbase in simple terms?

Why does Pacbase 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 Pacbase?

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 Pacbase.