Academic Earth - Operating Systems and System Programming

Academic Earth, the academic video lecture site has a series of lectures by Brian Harvey of Berkeley on Operating Systems and System Programming. Described thus:
Basic concepts of operating systems and system programming. Utility programs, subsystems, multiple-program systems. Processes, interprocess communication, and synchronization. Memory allocation, segmentation, paging. Loading and linking, libraries. Resource allocation, scheduling, performance evaluation. File systems, storage devices, I/O systems. Protection, security, and privacy.
Much of this is in more depth than we cover in AC2B but I think that dipping into many of the lectures could give you great background on the topics of the module. For example, lecture 21 on network communication abstractions and RPC might be useful. Anyhow, here is the introductory lecture to get you started: