Which of the following is NOT Internal documentationProgram specificationCommentsMeaningful data namesClear coding layout

Step 1: Break Down the Problem

To identify which option is not considered internal documentation, we need to analyze each of the provided options in the context of software development documentation.

Step 2: Relevant Concepts

Internal documentation typically refers to information that describes the structure and functionality of the code written. It usually includes:

1. Program specifications
2. Comments in the code
3. Meaningful data names
4. Clear coding layout

Step 3: Analysis and Detail

1. Program Specification: This outlines the functionalities and requirements of the software, making it a part of internal documentation.
2. Comments: These are notes within the code that explain what certain parts of the code do, clearly falling under internal documentation.
3. Meaningful Data Names: Using descriptive variable names aids in understanding the code, thus is also an aspect of internal documentation.
4. Clear Coding Layout: Organizing code in a readable way helps maintainability and understanding, which is essential in internal documentation.

Step 4: Verify and Summarize

Now let's summarize: Program specification, comments, meaningful data names, and clear coding layout are all components of internal documentation. However, typically only "program specification" might sometimes be seen as more of an external or project-level documentation aspect depending on context.

Final Answer

Meaningful data names is typically considered part of internal documentation, hence Program specification is the correct answer that could be interpreted as NOT purely internal documentation depending on the context.