Regarding online web links there would be way too many.

While not all are books per say, my all time favorites, that I can remember, are:

• What Every Programmer Should Know About Memory by Ulrich Drepper. Definitely a long paper but worth the read, especially if you've never thought of that topic before.
  
• Eric Raymond's classic "The Art of Unix Programming", as much as you want to argue about this book, it still sets really well the hackers mentality when it comes to putting Unix programs together
  
• File system forensic analysis by Brian Carrier. Goes into depth about the file system.
  
• Program design in the UNIX environmentClassic read about the design of Unix programs
  
• Trends and Evolution of Window Interfaces One of the most fantastic paper about window management and what it implies
  
• The Design of the Unix operating system
  

Other than that I got the following computer-related physical books:

• Clean Architecture - Robert Martin
  
• The clean coder: A code of conduct for professional programmers - Robert Martin
  
• Software Architecture in Practice 3rd edition
  
• Building evolutionary architectures - Neal Ford
  
• Domain-Driven Design - Eric Evans - Currently reading, almost done
  
• Beyond software architecture: Hohmann
  
• Computer Architecture: A Quantitative approach - Hennesy Patterson
  
• Compilers - Aho Lam Seth Ullman
  
• Operating system concepts - Silberschatz
  
• Algorithms: Sedgewick