This project is a data acquisition server, written for Century Aluminum in Kentucky. There are two major parts to this project: card drivers (for the PCL-711, ISO-813, and DIO-144 analog/digital I/O cards), and a master server that collects data from the cards and puts it into shared memory.
Several other utilities are discussed as well, such as showsamp, which gets the data from shared memory. This chapter is a good insight on how to handle I/O, as well as shared-memory management.