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Computer Organization & Architecture

Foundations of Computing7

Instruction Set Architecture5

Datapath & Control Unit4

Instruction Pipelining4

Memory Hierarchy7

Why can't we just build one giant, fast memory?
How cache actually works: blocks, tags and the address split
What happens when you write to cache, and what gets evicted?
Main memory: how RAM stores a bit as a leaking bucket of charge
Memory interleaving, and the read-only memory your computer boots from
Secondary storage: why your files survive being turned off
Virtual memory: giving every program its own private, pretend address space

I/O Interfaces & Interrupts5

Boot to Execution: The Full System Trace5

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Computer Organization & Architecture

Foundations of Computing7

Instruction Set Architecture5

Datapath & Control Unit4

Instruction Pipelining4

Memory Hierarchy7

Why can't we just build one giant, fast memory?
How cache actually works: blocks, tags and the address split
What happens when you write to cache, and what gets evicted?
Main memory: how RAM stores a bit as a leaking bucket of charge
Memory interleaving, and the read-only memory your computer boots from
Secondary storage: why your files survive being turned off
Virtual memory: giving every program its own private, pretend address space

I/O Interfaces & Interrupts5

Boot to Execution: The Full System Trace5

Learn Computer Organization & Architecture Memory Hierarchy

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Secondary storage: why your files survive being turned off

RAM forgets everything the instant power is lost. Secondary storage is built specifically not to - here's how a spinning disk and a solid-state drive each pull that off, completely differently.

12 min readUpdated 2026-09-03computer-architecturesecondary-storagehard-diskssd