# CPU Architecture & Portability · 1

[Agila University track](https://edu.agilaos.com/track.php?track=22&lang=en)

About 15 minutes per lesson. Predict, run, change, explain, then complete the check in University.

- [Lesson 1: Source, machine code, and ISA](lesson-1/lesson.html)
- [Lesson 2: Bits, bytes, and integer width](lesson-2/lesson.html)
- [Lesson 3: Endianness is a byte-order rule](lesson-3/lesson.html)