How adilahmedunar/operating_systems- works
1. Repository purpose
- This is a course content repository, not an executable software system.
- Its primary function is to store and publish Operating Systems lecture slides for a semester course.
2. Top-level architecture
- The repo has two main layers:
- a README-driven catalog that describes the course structure and provides access links,
- a set of week-based content folders containing PowerPoint slide decks.
- There is no application runtime, backend, frontend, or build pipeline.
3. Primary content subsystem: lecture assets
- The actual teaching material lives in folders named by week:
- Week_01_Lectures through Week_11_Lectures
- Each folder contains one or more .pptx files representing lecture decks.
- These are the source artifacts instructors or students would download and open locally.
4. Curriculum organization
- The folder layout mirrors the course progression:
- introductory OS concepts,
- process states and IPC,
- threads and CPU scheduling,
- synchronization and deadlocks,
- memory management.
- This creates a time-based content boundary: each week is an isolated teaching unit.
5. README as the index and navigation layer
- README.md acts as the central catalog for the repo.
- It maps lecture numbers to topics and provides direct download links to each slide deck.
- For architecture diagrams, the README should be treated as the entry point and the weekly folders as the content store.
6. Distribution flow
- The README links to files using GitHub raw.githubusercontent.com URLs.
- That means the repo is designed for direct static file delivery through GitHub rather than via a custom hosting service.
- The access flow is: user reads README → follows raw link → downloads .pptx asset.
7. Content granularity
- Lectures are packaged at varying granularity:
- single-lecture files,
- combined lecture files such as 10 & 11, 12 & 13, 20 - 22, or 24 -25.
- This suggests the content boundary is instructional, not technical; files reflect how the course was taught rather than a strict one-lecture-per-file rule.
8. Repository conventions and placeholders
- Several folders contain placeholder files like .keep, .keeps, or keep.
- These are used to preserve empty directories in version control.
- Their presence indicates the structure itself is important, even when a folder has no visible content yet.
9. External dependencies and tooling
- The only meaningful external platform is GitHub, used for file storage and raw file serving.
- The content format is Microsoft PowerPoint (.pptx), so the repo depends on standard desktop presentation tools for consumption.
- There is no evidence of code dependencies, package managers, or runtime libraries.
10. Audience and usage boundary
- The repo is intended for:
- students downloading lecture slides,
- instructors sharing course materials,
- course support activities such as assignments, quizzes, and concept clarification.
- It is a content distribution boundary, not a collaboration or computation boundary.
11. Implications for an architecture diagram
- Diagram the repo as:
- a documentation/catalog node (README.md),
- connected to multiple week-based asset folders,
- with an outbound access path to GitHub raw file delivery,
- and an external consumer layer of humans and presentation software.
- Do not model services, APIs, databases, or background jobs; they do not exist here.
12. Overall architectural summary
- The repository is a static, hierarchical lecture archive.
- Its structure is organized by teaching week, indexed by README, and delivered as downloadable presentation files through GitHub-hosted raw links.
Main entry points: README.md README.md · Lecture # 01 Introduction to Operating Systems.pptx OS Intro · Lecture # 04 Dual-Mode Operation, System Calls, and Inter-Process Communication (IPC) in Operating Systems.pptx IPC · Lecture # 10 & 11 Lecture # 09 CPU Scheduling Algorithms – Preemptive (Round Robin).pptx Round Robin
Components 22
Catalog
README-centered course index and navigation
- README.md · Central catalog linking the semester structure and raw slide downloads
README.md
Lecture Weeks
Time-based lecture asset folders
- Week 01 · Introductory OS lectures
Week_01_Lectures - Week 02 · Processes, system calls, IPC, and threads
Week_02_Lectures - Week 03 · CPU scheduling foundations
Week_03_Lectures - Week 04 · Round robin scheduling materials
Week_04_Lectures - Week 05 · Priority scheduling and practice
Week_05_Lectures - Week 06 · Multilevel queue and feedback scheduling
Week_06_Lectures - Week 07 · Later scheduling lectures
Week_07_Lectures - Week 08 · Continuation lecture assets
Week_08_Lectures - Week 09 · Combined lecture deck boundary
Week_09_Lectures - Week 10 · Lecture assets for the later term
Week_10_Lectures - Week 11 · Final lecture asset bundle
Week_11_Lectures - OS Intro · Representative lecture slide deck for early course content
Week_01_Lectures/Lecture # 01 Introduction to Operating Systems.pptx - IPC · Representative deck for system calls and IPC
Week_02_Lectures/Lecture # 04 Dual-Mode Operation, System Calls, and Inter-Process Communication (IPC) in Operating Systems.pptx - Round Robin · Representative deck for preemptive scheduling
Week_04_Lectures/Lecture # 10 & 11 Lecture # 09 CPU Scheduling Algorithms – Preemptive (Round Robin).pptx - MLFQ · Representative deck for multilevel scheduling
Week_06_Lectures/Lecture # 15 Multilevel Queue & Multilevel Feedback Queue Scheduling – Theory + Class Activity.pptx - Combined Deck · Representative combined lecture bundle
Week_09_Lectures/Lecture # 20 - 22.pptx - Final Bundle · Representative final week lecture bundle
Week_11_Lectures/Lecture # 26 - 29.pptx
Delivery
External access and consumption path
- GitHub Raw · Raw content serving for direct pptx downloads
- Students · Download and open slide decks locally
- Instructors · Share and reference weekly course materials
- PowerPoint · Local presentation software used to consume the decks
Connections 32
- README.md → Week 01: indexes · README organizes the first lecture week
- README.md → Week 02: indexes · README organizes the second lecture week
- README.md → Week 03: indexes · README organizes the third lecture week
- README.md → Week 04: indexes · README organizes the fourth lecture week
- README.md → Week 05: indexes · README organizes the fifth lecture week
- README.md → Week 06: indexes · README organizes the sixth lecture week
- README.md → Week 07: indexes · README organizes the seventh lecture week
- README.md → Week 08: indexes · README organizes the eighth lecture week
- README.md → Week 09: indexes · README organizes the ninth lecture week
- README.md → Week 10: indexes · README organizes the tenth lecture week
- README.md → Week 11: indexes · README organizes the eleventh lecture week
- Week 01 → OS Intro: contains · Week 01 folder stores lecture slide decks
- Week 02 → IPC: contains · Week 02 folder stores lecture slide decks
- Week 04 → Round Robin: contains · Week 04 folder stores lecture slide decks
- Week 06 → MLFQ: contains · Week 06 folder stores lecture slide decks
- Week 09 → Combined Deck: contains · Week 09 folder stores lecture slide decks
- Week 11 → Final Bundle: contains · Week 11 folder stores lecture slide decks
- README.md → GitHub Raw: links · README points to raw GitHub delivery URLs
- GitHub Raw → OS Intro: delivers · Raw file delivery provides downloadable pptx assets
- GitHub Raw → IPC: delivers · Raw file delivery provides downloadable pptx assets
- GitHub Raw → Round Robin: delivers · Raw file delivery provides downloadable pptx assets
- GitHub Raw → MLFQ: delivers · Raw file delivery provides downloadable pptx assets
- GitHub Raw → Combined Deck: delivers · Raw file delivery provides downloadable pptx assets
- GitHub Raw → Final Bundle: delivers · Raw file delivery provides downloadable pptx assets
- Students → README.md: navigate · Students start from the catalog to find lecture materials
- Instructors → README.md: publish · Instructors maintain and reference the catalog
- Students → PowerPoint: open with · Students consume decks in presentation software
- Instructors → PowerPoint: author with · Instructors prepare and present slide decks locally
- PowerPoint → OS Intro: opens · Presentation software reads pptx assets
- PowerPoint → IPC: opens · Presentation software reads pptx assets
- PowerPoint → Round Robin: opens · Presentation software reads pptx assets
- PowerPoint → MLFQ: opens · Presentation software reads pptx assets