Programming in C: A Tutorial by Brian W. Kernighan. This is only of historical interest: the document uses a dialect of C from 1974 that is no longer used.
This is BrainLog, a blog by Dan Sanderson. Older entries, from October 1999 through September 2010, are preserved for posterity, but are no longer maintained. See the front page and newer entries.
January 17, 2002