Defensive programming is a software development practice aimed at writing code that remains functional and robust even in the face of unexpected inputs, usage scenarios, or system errors. The primary goal is to create software that anticipates potential issues and handles them gracefully, reducing the chances of bugs and increasing the overall reliability of the application. Key principles of defensive programming include: 1. **Input Validation**: Always validate inputs to ensure they meet expected formats and constraints.

In computer programming, **coupling** refers to the degree of interdependence between software modules or components. It is an important concept in software design that affects maintainability, scalability, and the overall quality of a system. Coupling can be categorized as follows: 1. **Tight Coupling**: - When modules are tightly coupled, they are highly dependent on each other. Changes in one module often require changes in the other.

Composition over inheritance is a design principle in object-oriented programming that favors using composition to achieve code reuse and flexibility rather than relying solely on inheritance. ### Key Concepts of Composition over Inheritance: 1. **Composition**: This involves building complex objects by combining simpler objects or components.

Command-Query Separation (CQS) is a programming principle that states that a method should either be a command that performs an action or a query that returns data, but not both. This principle helps to maintain a clear distinction between actions that change the state of a system and those that retrieve information about the system's state. ### Key Aspects of CQS: 1. **Commands**: These are methods that perform operations that modify the state of an object or system.

In computer science, particularly in software engineering, cohesion refers to the degree to which the elements within a module, class, or component of a system are related to one another. It is a measure of how well the parts of a system work together to meet a single, well-defined purpose. Cohesion is a key concept in the design of software systems and is often used to evaluate the quality of the system's modularity.

Code reuse refers to the practice of using existing code for new purposes or applications, rather than writing new code from scratch. This can involve using libraries, frameworks, modules, or even individual functions that have already been developed and tested. The main objectives of code reuse are to save time, reduce redundancy, and improve software quality by leveraging proven, reliable components. ### Benefits of Code Reuse: 1. **Efficiency**: Reduces development time as developers can build upon existing code.

The Booch method, developed by Grady Booch in the late 1980s, is a modeling method used in software engineering for object-oriented design. It provides a set of principles and techniques for analyzing and designing software systems, particularly in the context of object-oriented programming. The Booch method emphasizes the use of visual modeling and includes several key elements: 1. **Modeling**: The Booch method employs a variety of diagrams to represent system components, relationships, and interactions.

The Abstraction Principle in computer programming is a fundamental concept that involves reducing complexity by hiding the details of implementation and exposing only the essential features of a system or component. This principle allows developers to manage complexity by focusing on what a component does rather than how it does it. Here are some key points about the Abstraction Principle: 1. **Simplification**: Abstraction simplifies complex systems by breaking them down into more manageable parts or layers.

Zeno is a programming language designed primarily for scientific computing and mathematical applications. It emphasizes a high degree of expressiveness and ease of use, enabling users to define complex mathematical concepts and algorithms succinctly. Key features of Zeno typically include: 1. **Mathematical Notation**: Zeno often utilizes a syntax that resembles mathematical notation, making it more intuitive for users familiar with mathematics.

Standard ML of New Jersey (SML/NJ) is an implementation of the Standard ML programming language. Standard ML (SML) is a functional programming language known for its strong type system, type inference, and support for concurrent programming. It is particularly recognized for its use in teaching programming language concepts and for research in programming language theory.

Rapira is a brand of razor blades that originated in Russia. The blades are known for their sharpness and durability, making them popular among wet shaving enthusiasts. Rapira blades are typically compatible with safety razors and are available in various styles and types, catering to different shaving preferences. In addition to the blade itself, "Rapira" may also refer to a company or a product line related to shaving or grooming.

Protel can refer to different things depending on the context, but it is most commonly associated with the following: 1. **Protel (Software)**: Protel is a software application used for PCB (Printed Circuit Board) design. It was originally developed by Altium Limited and later became known as Altium Designer. The software provides tools for schematic capture, PCB layout, and design management, and it is widely used in the electronics industry for designing complex circuits.

PLANC refers to the **Product Life-cycle Assessment and Networked Collaboration Framework**. It is a method or system that emphasizes analyzing the environmental impacts of a product throughout its entire life cycle, from raw material extraction to production, use, and disposal. The framework encourages collaboration among stakeholders to improve sustainability practices and reduce the environmental footprint of products.

Alma-0 is a programming language that is primarily designed for educational purposes, particularly in the context of teaching the principles of programming and computer science. It is a high-level programming language that is based on a subset of the logic programming paradigm, which emphasizes the use of formal logic for program construction and reasoning. Alma-0 is known for its simplicity and clarity, making it easier for students to understand fundamental programming concepts such as variables, control structures, and data types.

Several programming languages were created in the 1980s. Here are some notable ones: 1. **C++** (1985) - Developed by Bjarne Stroustrup, C++ is an extension of the C programming language that introduces object-oriented programming features. 2. **Objective-C** (early 1980s) - A language that adds Smalltalk-style messaging to the C programming language, it became popular as the primary programming language for Apple's macOS and iOS.

SuperBASIC is a programming language that was developed in the late 1970s and early 1980s, primarily for use with the Acorn BBC Microcomputer. It is an extension of the original BASIC programming language, adding features and capabilities that enhance its usability, particularly in educational and home computing contexts.

Smalltalk is an object-oriented programming language that was created in the 1970s by Alan Kay, Dan Ingalls, Adele Goldberg, and others at Xerox PARC. It is one of the earliest programming languages designed with a focus on the concept of objects, encapsulation, and message passing. Some key features of Smalltalk include: 1. **Pure Object-Oriented**: Everything in Smalltalk is an object, including classes, numbers, and even control structures.

Gödel is a logic programming language that is based on the principles of logic programming and influenced by the foundations of formal logic, particularly those of Kurt Gödel. It was developed primarily for research and educational purposes in the fields of artificial intelligence and computational logic. Key features of Gödel include: 1. **Logic Programming Paradigm**: Gödel follows the principles of logical inference, allowing programmers to express knowledge in the form of logical sentences, which can then be used to derive conclusions.

COBOL, which stands for Common Business-Oriented Language, is a high-level programming language that was developed in the late 1950s and early 1960s for business, finance, and administrative systems for companies and governments. It was designed to be readable and understandable by non-programmers, emphasizing clear and verbose syntax.

CLU is a programming language designed in the late 1970s by Barbara Liskov and her students at the Massachusetts Institute of Technology (MIT). It is particularly notable for its strong emphasis on data abstraction and modularity, which were advanced concepts at the time of its creation.