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Course information comes from the public UCLA General Catalog. Requisites are read from UCLA’s published wording and can be incomplete or out of date — check the official catalog listing and your department adviser before you enroll.

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COM SCI M151B · CS M151BComputer Systems Architecture

Computer Science · 4 units · Undergraduate upper division (100-199)

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(Same as Electrical and Computer Engineering M116C.) Recommended: courses 111, and M152A or Electrical and Computer Engineering M116L. Computer system organization and design, implementation of CPU datapath and control, instruction set design, memory hierarchy (caches, main memory, virtual memory) organization and management, input/output subsystems (bus structures, interrupts, DMA), performance evaluation, pipelined processors.

Letter grading.

When it runs

Checking the Schedule of Classes…

Requisites

Official UCLA wording

Enforced requisites: courses 33, and M51A or Electrical and Computer Engineering M16.

BruinTree reads · Prerequisite

confidence 1.00 · from text
all of
  • COM SCI 33
  • one of
    • COM SCI M51A
    • EC ENGR M16

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About COM SCI M151B. We read UCLA’s requisite wording by machine, and it gets things wrong.

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Requires

Everything that has to come before this course, not just the courses named in the requisite above.

COM SCI M151B

  • COM SCI 33Introduction to Computer Organization
    • COM SCI 32Introduction to Computer Science II
      • COM SCI 31Introduction to Computer Science I
  • COM SCI M51ALogic Design of Digital Systems
  • EC ENGR M16Logic Design of Digital Systems

3 direct requisites. The whole upstream is here — 5 courses over 3 levels. Every course here opens its own tree.

Unlocks

What this course is a requisite for, and what those courses lead to in turn.

COM SCI M151B

  • COM SCI 133Parallel and Distributed Computing
  • COM SCI 152BDigital Design Project Laboratory
  • COM SCI 251AAdvanced Computer Architecture
    • COM SCI 252AArithmetic Algorithms and Processors
  • COM SCI 251BParallel Computer Architectures
  • COM SCI 254AAdvanced Graphics Processing Unit Microarchitecture for Artificial Intelligence and Graphics Rendering
  • COM SCI 256AAdvanced Scalable Architectures

6 courses list this as a requisite. The whole downstream is here — 7 courses over 2 levels. Every course here opens its own tree.

  • Fall 2025
  • Winter 2026
  • Spring 2026
  • Fall 2026
  • Winter 2027
  • Spring 2027

Scheduled, not typical — from UCLA’s Schedule of Classes, which publishes Fall 2025 through Spring 2027 and nothing before it.