# adilahmedunar/operating_systems- architecture
> Architecture diagram of the GitHub repository adilahmedunar/operating_systems-, generated by GitDiagram from its file tree, README and a sample of source files (last updated 2026-06-18). It is an AI-made overview: check details against the source.
- Interactive diagram: https://gitdiagram.com/adilahmedunar/operating_systems-
- Repository: https://github.com/adilahmedunar/operating_systems-
## Overview
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`](https://github.com/adilahmedunar/operating_systems-/blob/main/README.md) (README.md), [`Week_01_Lectures/Lecture # 01 Introduction to Operating Systems.pptx`](https://github.com/adilahmedunar/operating_systems-/blob/HEAD/Week_01_Lectures/Lecture%20%23%2001%20Introduction%20to%20Operating%20Systems.pptx) (OS Intro), [`Week_02_Lectures/Lecture # 04 Dual-Mode Operation, System Calls, and Inter-Process Communication (IPC) in Operating Systems.pptx`](https://github.com/adilahmedunar/operating_systems-/blob/HEAD/Week_02_Lectures/Lecture%20%23%2004%20Dual-Mode%20Operation%2C%20System%20Calls%2C%20and%20Inter-Process%20Communication%20(IPC)%20in%20Operating%20Systems.pptx) (IPC), [`Week_04_Lectures/Lecture # 10 & 11 Lecture # 09 CPU Scheduling Algorithms – Preemptive (Round Robin).pptx`](https://github.com/adilahmedunar/operating_systems-/blob/HEAD/Week_04_Lectures/Lecture%20%23%2010%20%26%2011%20Lecture%20%23%2009%20CPU%20Scheduling%20Algorithms%20%E2%80%93%20Preemptive%20(Round%20Robin).pptx) (Round Robin)
## Diagram (Mermaid)
```mermaid
flowchart TD
subgraph group_index["Catalog"]
node_readme["README.md
course index
[README.md]"]
end
subgraph group_weeks["Lecture Weeks"]
node_week01["Week 01
content folder"]
node_week02["Week 02
content folder"]
node_week03["Week 03
content folder"]
node_week04["Week 04
content folder"]
node_week05["Week 05
content folder"]
node_week06["Week 06
content folder"]
node_week07["Week 07
content folder"]
node_week08["Week 08
content folder"]
node_week09["Week 09
content folder"]
node_week10["Week 10
content folder"]
node_week11["Week 11
content folder"]
node_deck01["OS Intro
pptx deck"]
node_deckipc["IPC
pptx deck"]
node_deckrr["Round Robin
pptx deck"]
node_deckmlfq["MLFQ
pptx deck"]
node_deckcombo["Combined Deck
pptx deck"]
node_deckfinal["Final Bundle
pptx deck"]
end
subgraph group_delivery["Delivery"]
node_githubraw[("GitHub Raw
static file delivery")]
node_students(("Students
content consumers"))
node_instructors(("Instructors
content publishers"))
node_pptviewer["PowerPoint
desktop viewer"]
end
node_readme -->|"indexes"| node_week01
node_readme -->|"indexes"| node_week02
node_readme -->|"indexes"| node_week03
node_readme -->|"indexes"| node_week04
node_readme -->|"indexes"| node_week05
node_readme -->|"indexes"| node_week06
node_readme -->|"indexes"| node_week07
node_readme -->|"indexes"| node_week08
node_readme -->|"indexes"| node_week09
node_readme -->|"indexes"| node_week10
node_readme -->|"indexes"| node_week11
node_week01 -->|"contains"| node_deck01
node_week02 -->|"contains"| node_deckipc
node_week04 -->|"contains"| node_deckrr
node_week06 -->|"contains"| node_deckmlfq
node_week09 -->|"contains"| node_deckcombo
node_week11 -->|"contains"| node_deckfinal
node_readme -->|"links"| node_githubraw
node_githubraw -->|"delivers"| node_deck01
node_githubraw -->|"delivers"| node_deckipc
node_githubraw -->|"delivers"| node_deckrr
node_githubraw -->|"delivers"| node_deckmlfq
node_githubraw -->|"delivers"| node_deckcombo
node_githubraw -->|"delivers"| node_deckfinal
node_students -->|"navigate"| node_readme
node_instructors -->|"publish"| node_readme
node_students -->|"open with"| node_pptviewer
node_instructors -->|"author with"| node_pptviewer
node_pptviewer -->|"opens"| node_deck01
node_pptviewer -->|"opens"| node_deckipc
node_pptviewer -->|"opens"| node_deckrr
node_pptviewer -->|"opens"| node_deckmlfq
click node_readme "https://github.com/adilahmedunar/operating_systems-/blob/main/README.md"
click node_week01 "https://github.com/adilahmedunar/operating_systems-/tree/main/Week_01_Lectures"
click node_week02 "https://github.com/adilahmedunar/operating_systems-/tree/main/Week_02_Lectures"
click node_week03 "https://github.com/adilahmedunar/operating_systems-/tree/main/Week_03_Lectures"
click node_week04 "https://github.com/adilahmedunar/operating_systems-/tree/main/Week_04_Lectures"
click node_week05 "https://github.com/adilahmedunar/operating_systems-/tree/main/Week_05_Lectures"
click node_week06 "https://github.com/adilahmedunar/operating_systems-/tree/main/Week_06_Lectures"
click node_week07 "https://github.com/adilahmedunar/operating_systems-/tree/main/Week_07_Lectures"
click node_week08 "https://github.com/adilahmedunar/operating_systems-/tree/main/Week_08_Lectures"
click node_week09 "https://github.com/adilahmedunar/operating_systems-/tree/main/Week_09_Lectures"
click node_week10 "https://github.com/adilahmedunar/operating_systems-/tree/main/Week_10_Lectures"
click node_week11 "https://github.com/adilahmedunar/operating_systems-/tree/main/Week_11_Lectures"
click node_deck01 "https://github.com/adilahmedunar/operating_systems-/blob/main/Week_01_Lectures/Lecture # 01 Introduction to Operating Systems.pptx"
click node_deckipc "https://github.com/adilahmedunar/operating_systems-/blob/main/Week_02_Lectures/Lecture # 04 Dual-Mode Operation, System Calls, and Inter-Process Communication (IPC) in Operating Systems.pptx"
click node_deckrr "https://github.com/adilahmedunar/operating_systems-/blob/main/Week_04_Lectures/Lecture # 10 & 11 Lecture # 09 CPU Scheduling Algorithms – Preemptive (Round Robin).pptx"
click node_deckmlfq "https://github.com/adilahmedunar/operating_systems-/blob/main/Week_06_Lectures/Lecture # 15 Multilevel Queue & Multilevel Feedback Queue Scheduling – Theory + Class Activity.pptx"
click node_deckcombo "https://github.com/adilahmedunar/operating_systems-/blob/main/Week_09_Lectures/Lecture # 20 - 22.pptx"
click node_deckfinal "https://github.com/adilahmedunar/operating_systems-/blob/main/Week_11_Lectures/Lecture # 26 - 29.pptx"
classDef toneNeutral fill:#f8fafc,stroke:#334155,stroke-width:1.5px,color:#0f172a
classDef toneBlue fill:#dbeafe,stroke:#2563eb,stroke-width:1.5px,color:#172554
classDef toneAmber fill:#fef3c7,stroke:#d97706,stroke-width:1.5px,color:#78350f
classDef toneMint fill:#dcfce7,stroke:#16a34a,stroke-width:1.5px,color:#14532d
classDef toneRose fill:#ffe4e6,stroke:#e11d48,stroke-width:1.5px,color:#881337
classDef toneIndigo fill:#e0e7ff,stroke:#4f46e5,stroke-width:1.5px,color:#312e81
classDef toneTeal fill:#ccfbf1,stroke:#0f766e,stroke-width:1.5px,color:#134e4a
class node_readme toneBlue
class node_week01,node_week02,node_week03,node_week04,node_week05,node_week06,node_week07,node_week08,node_week09,node_week10,node_week11,node_deck01,node_deckipc,node_deckrr,node_deckmlfq,node_deckcombo,node_deckfinal toneAmber
class node_githubraw,node_students,node_instructors,node_pptviewer toneMint
```
## Components
### Catalog
README-centered course index and navigation
- [README.md](https://github.com/adilahmedunar/operating_systems-/blob/main/README.md): course index · Central catalog linking the semester structure and raw slide downloads · `README.md`
### Lecture Weeks
Time-based lecture asset folders
- [Week 01](https://github.com/adilahmedunar/operating_systems-/tree/main/Week_01_Lectures): content folder · Introductory OS lectures · `Week_01_Lectures`
- [Week 02](https://github.com/adilahmedunar/operating_systems-/tree/main/Week_02_Lectures): content folder · Processes, system calls, IPC, and threads · `Week_02_Lectures`
- [Week 03](https://github.com/adilahmedunar/operating_systems-/tree/main/Week_03_Lectures): content folder · CPU scheduling foundations · `Week_03_Lectures`
- [Week 04](https://github.com/adilahmedunar/operating_systems-/tree/main/Week_04_Lectures): content folder · Round robin scheduling materials · `Week_04_Lectures`
- [Week 05](https://github.com/adilahmedunar/operating_systems-/tree/main/Week_05_Lectures): content folder · Priority scheduling and practice · `Week_05_Lectures`
- [Week 06](https://github.com/adilahmedunar/operating_systems-/tree/main/Week_06_Lectures): content folder · Multilevel queue and feedback scheduling · `Week_06_Lectures`
- [Week 07](https://github.com/adilahmedunar/operating_systems-/tree/main/Week_07_Lectures): content folder · Later scheduling lectures · `Week_07_Lectures`
- [Week 08](https://github.com/adilahmedunar/operating_systems-/tree/main/Week_08_Lectures): content folder · Continuation lecture assets · `Week_08_Lectures`
- [Week 09](https://github.com/adilahmedunar/operating_systems-/tree/main/Week_09_Lectures): content folder · Combined lecture deck boundary · `Week_09_Lectures`
- [Week 10](https://github.com/adilahmedunar/operating_systems-/tree/main/Week_10_Lectures): content folder · Lecture assets for the later term · `Week_10_Lectures`
- [Week 11](https://github.com/adilahmedunar/operating_systems-/tree/main/Week_11_Lectures): content folder · Final lecture asset bundle · `Week_11_Lectures`
- [OS Intro](https://github.com/adilahmedunar/operating_systems-/blob/HEAD/Week_01_Lectures/Lecture%20%23%2001%20Introduction%20to%20Operating%20Systems.pptx): pptx deck · Representative lecture slide deck for early course content · `Week_01_Lectures/Lecture # 01 Introduction to Operating Systems.pptx`
- [IPC](https://github.com/adilahmedunar/operating_systems-/blob/HEAD/Week_02_Lectures/Lecture%20%23%2004%20Dual-Mode%20Operation%2C%20System%20Calls%2C%20and%20Inter-Process%20Communication%20(IPC)%20in%20Operating%20Systems.pptx): pptx deck · 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](https://github.com/adilahmedunar/operating_systems-/blob/HEAD/Week_04_Lectures/Lecture%20%23%2010%20%26%2011%20Lecture%20%23%2009%20CPU%20Scheduling%20Algorithms%20%E2%80%93%20Preemptive%20(Round%20Robin).pptx): pptx deck · Representative deck for preemptive scheduling · `Week_04_Lectures/Lecture # 10 & 11 Lecture # 09 CPU Scheduling Algorithms – Preemptive (Round Robin).pptx`
- [MLFQ](https://github.com/adilahmedunar/operating_systems-/blob/HEAD/Week_06_Lectures/Lecture%20%23%2015%20Multilevel%20Queue%20%26%20Multilevel%20Feedback%20Queue%20Scheduling%20%E2%80%93%20Theory%20%2B%20Class%20Activity.pptx): pptx deck · Representative deck for multilevel scheduling · `Week_06_Lectures/Lecture # 15 Multilevel Queue & Multilevel Feedback Queue Scheduling – Theory + Class Activity.pptx`
- [Combined Deck](https://github.com/adilahmedunar/operating_systems-/blob/HEAD/Week_09_Lectures/Lecture%20%23%2020%20-%2022.pptx): pptx deck · Representative combined lecture bundle · `Week_09_Lectures/Lecture # 20 - 22.pptx`
- [Final Bundle](https://github.com/adilahmedunar/operating_systems-/blob/HEAD/Week_11_Lectures/Lecture%20%23%2026%20-%2029.pptx): pptx deck · Representative final week lecture bundle · `Week_11_Lectures/Lecture # 26 - 29.pptx`
### Delivery
External access and consumption path
- **GitHub Raw**: static file delivery · Raw content serving for direct pptx downloads
- **Students**: content consumers · Download and open slide decks locally
- **Instructors**: content publishers · Share and reference weekly course materials
- **PowerPoint**: desktop viewer · Local presentation software used to consume the decks
## Connections
- 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