110 http://isa.epfl.ch/imoniteur_ISAP/ itffichecours.txt?path=EPFL.Etu.FicheCours.HeaderFR itffichecours.txt?path=EPFL.Etu.FicheCours.GlobalNav_js fr 2026 249847 6683147 249847 2840683608 2840683608 0 0 Informatique IN IC Faculté informatique et communications School of Computer and Communication Sciences !itffichecours.htm?ww_i_matiere=1501687491&ww_x_anneeAcad=2840683608&ww_i_section=249847&ww_i_niveau=6683147 1696552884 1696552963 2025-2026 COURSE BOOKLET CS-522 Principles of computer systems Principles of computer systems Lecturers Argyraki Katerina, Candea George Language of teaching English Cursus Communication Systems - master program(2025-2026, SC - Master EPFL 2024)
Communication Systems - master program(2025-2026, SC - Master EPFL 2025)
Computer Science - Cybersecurity(2025-2026, IN-CS - Master 2024)
Computer Science - Cybersecurity(2025-2026, IN-CS - Master 2025)
Computer Science(2025-2026, IN - Master 2024)
Computer Science(2025-2026, IN - Master 2025)
Computer and Communication Sciences (edoc)(2025-2026, EDIC 2025-26)
SemesterMand.OptionFilières
x
MA1, MA3x
MA1, MA3xA C D G
MA1, MA3xA C D G L
 Credits 8 Session Winter Workload 240h Exam During the semester Number of positions Semester Fall Weeks 14 Hours 4 weekly
Courses 4 weekly
Study planSemesterMand.OptionFilières
Cyber security 2025-26MA1x
Cyber security 2025-26MA3x
EDIC - Computer and communication sciences 2025-26x
Informatique 2025-26MA1xA C D G L
Informatique 2025-26MA3xA C D G L
Systèmes de communication 2025-26MA1xA C D G
Systèmes de communication 2025-26MA3xA C D G
Cursus Sem. Type
Computer and Communication Sciences Opt.
Computer science MA1, MA3 Obl.
Cybersecurity MA1, MA3 Opt.
SC master EPFL MA1, MA3 Opt.
Summary This advanced graduate course teaches the key design principles underlying successful computer and communication systems, and shows how to solve real problems with ideas, techniques, and algorithms from operating systems, networks, databases, programming languages, and computer architecture. Content

A modern computer system spans many layers: applications, libraries, operating systems, networks, and hardware devices. Building a good system entails making the right trade-offs (e.g., between performance, durability, and correctness) and understanding emergent behaviors. Great system designers make these trade-offs in a principled fashion, whereas average ones make them by trial-and-error. In this course, we develop a principled framework for computer system design, covering the following topics:

  • Modules and interfaces
  • Names
  • Layers
  • Indirection and virtualization
  • Redundancy and fault tolerance
  • Client/server architectures
  • Distributed systems
  • Transactional building blocks
 Learning Prerequisites Required courses

The course is intellectually challenging and fast-paced, and it requires a solid background in operating systems, databases, networking, programming languages, and computer architecture. The basic courses on these topics teach how the elemental parts of modern systems work, and this course picks up where the basic courses leave off. To do well, a student must master the material taught in the following courses:

  • CS-202 Computer Systems
  • CS-300 Data-Intensive Systems
  • CS-302 Parallelism and Concurrency
 Recommended courses

The following EPFL courses cover material that significantly helps students taking this course, however they are not required:

  • CS-470: Advanced Computer Architecture
  • CS-471 Advanced Multiprocessor Architecture
  • CS-477 Advanced Operating Systems
  • COM-407: Advanced Computer Networking
  • CS-438 Decentralized Systems Engineering
  • CS-453 Concurrent Computing
  • CS-420 Advanced Compiler Construction
 Learning Outcomes By the end of the course, the student must be able to:
  • Design computer and communication systems that work well
  • Make rational design trade-offs (e.g., performance vs. correctness, latency vs. availability)
  • Anticipate emergent system behaviors (e.g., failure cascades, security vulnerabilities)
  • Integrate multiple techniques, ideas, and algorithms from different fields of computing/communication into a working system
 Teaching methods
  • A combination of online and in-class lectures
  • Interactive discussion sessions
  • Reading assignments
  • Homework assignments
 Expected student activities
  • Attend lectures and discussion sessions
  • Complete the reading and writing assignments
  • Participate actively in the course (physically and online)
 Assessment methods
  • 50% quizzes and assignments
  • 50% final exam
 Resources Bibliography

See course website for the latest information and an up-to-date bibliography.

 Websites Informatique, 2025-2026, Master semestre 1 Computer Science, 2025-2026, Master semester 1 Ecole polytechnique fédérale de Lausanne EPFL Ecole polytechnique fédérale de Lausanne EPFL 2025-2026 Master semestre 1 MA1 HIVER Master semester 1 MA1 Informatique IN Computer Science IN
Informatique IN Computer Science IN
A C D G L obligatoire mandatory
4 Cours Courses Heure(s) hebdo x 14 semaines Hour(s) per week x 14 weeks H hebdo H hebdo Candea George 172241
Informatique IN Computer Science IN
Argyraki Aikaterini 176638
Systèmes de communication SC Communication Systems SC
1501687491 Principles of computer systems Principles of computer systems 8
Pendant le semestre During the semester Crédit Credits 8 Session hiver Session winter HIV HIV
Informatique, 2025-2026, Master semestre 3 Computer Science, 2025-2026, Master semester 3 Ecole polytechnique fédérale de Lausanne EPFL Ecole polytechnique fédérale de Lausanne EPFL 2025-2026 Master semestre 3 MA3 HIVER Master semester 3 MA3 Informatique IN Computer Science IN
Informatique IN Computer Science IN
A C D G L obligatoire mandatory
4 Cours Courses Heure(s) hebdo x 14 semaines Hour(s) per week x 14 weeks H hebdo H hebdo Candea George 172241
Informatique IN Computer Science IN
Argyraki Aikaterini 176638
Systèmes de communication SC Communication Systems SC
1501687491 Principles of computer systems Principles of computer systems 8
Pendant le semestre During the semester Crédit Credits 8 Session hiver Session winter HIV HIV
Informatique - Cybersecurity, 2025-2026, Master semestre 1 Computer Science - Cybersecurity, 2025-2026, Master semester 1 Ecole polytechnique fédérale de Lausanne EPFL Ecole polytechnique fédérale de Lausanne EPFL 2025-2026 Master semestre 1 MA1 HIVER Master semester 1 MA1 Informatique - Cybersecurity IN_CS Computer Science - Cybersecurity IN_CS
Informatique IN Computer Science IN
optionnel optional
4 Cours Courses Heure(s) hebdo x 14 semaines Hour(s) per week x 14 weeks H hebdo H hebdo Candea George 172241
Informatique IN Computer Science IN
Argyraki Aikaterini 176638
Systèmes de communication SC Communication Systems SC
1501687491 Principles of computer systems Principles of computer systems 8
Pendant le semestre During the semester Crédit Credits 8 Session hiver Session winter HIV HIV
Informatique - Cybersecurity, 2025-2026, Master semestre 3 Computer Science - Cybersecurity, 2025-2026, Master semester 3 Ecole polytechnique fédérale de Lausanne EPFL Ecole polytechnique fédérale de Lausanne EPFL 2025-2026 Master semestre 3 MA3 HIVER Master semester 3 MA3 Informatique - Cybersecurity IN_CS Computer Science - Cybersecurity IN_CS
Informatique IN Computer Science IN
optionnel optional
4 Cours Courses Heure(s) hebdo x 14 semaines Hour(s) per week x 14 weeks H hebdo H hebdo Candea George 172241
Informatique IN Computer Science IN
Argyraki Aikaterini 176638
Systèmes de communication SC Communication Systems SC
1501687491 Principles of computer systems Principles of computer systems 8
Pendant le semestre During the semester Crédit Credits 8 Session hiver Session winter HIV HIV
Systèmes de communication - master, 2025-2026, Master semestre 1 Communication Systems - master program, 2025-2026, Master semester 1 Ecole polytechnique fédérale de Lausanne EPFL Ecole polytechnique fédérale de Lausanne EPFL 2025-2026 Master semestre 1 MA1 HIVER Master semester 1 MA1 Systèmes de communication - master SC_EPFL Communication Systems - master program SC_EPFL
Systèmes de communication SC Communication Systems SC
A C D G optionnel optional
4 Cours Courses Heure(s) hebdo x 14 semaines Hour(s) per week x 14 weeks H hebdo H hebdo Candea George 172241
Informatique IN Computer Science IN
Argyraki Aikaterini 176638
Systèmes de communication SC Communication Systems SC
1501687491 Principles of computer systems Principles of computer systems 8
Pendant le semestre During the semester Crédit Credits 8 Session hiver Session winter HIV HIV
Systèmes de communication - master, 2025-2026, Master semestre 3 Communication Systems - master program, 2025-2026, Master semester 3 Ecole polytechnique fédérale de Lausanne EPFL Ecole polytechnique fédérale de Lausanne EPFL 2025-2026 Master semestre 3 MA3 HIVER Master semester 3 MA3 Systèmes de communication - master SC_EPFL Communication Systems - master program SC_EPFL
Systèmes de communication SC Communication Systems SC
A C D G optionnel optional
4 Cours Courses Heure(s) hebdo x 14 semaines Hour(s) per week x 14 weeks H hebdo H hebdo Candea George 172241
Informatique IN Computer Science IN
Argyraki Aikaterini 176638
Systèmes de communication SC Communication Systems SC
1501687491 Principles of computer systems Principles of computer systems 8
Pendant le semestre During the semester Crédit Credits 8 Session hiver Session winter HIV HIV
Informatique et communications (edoc), 2025-2026 Computer and Communication Sciences (edoc), 2025-2026 Ecole polytechnique fédérale de Lausanne EPFL Ecole polytechnique fédérale de Lausanne EPFL 2025-2026 Informatique et communications (edoc) EDIC Computer and Communication Sciences (edoc) EDIC
optionnel optional
4 Cours Courses Heure(s) hebdo x 14 semaines Hour(s) per week x 14 weeks H hebdo H hebdo Candea George 172241
Informatique IN Computer Science IN
Argyraki Aikaterini 176638
Systèmes de communication SC Communication Systems SC
1501687491 Principles of computer systems Principles of computer systems 8
Pendant le semestre During the semester Crédit Credits 8 Session hiver Session winter HIV HIV
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