Lots more documentation
I've added lots more documentation on the Arc language: filesystem manipulation, anaphoric operations, iteration, threading, time operations, queues, and trees.
I/O in the Arc language
The Arc language provides many I/O operations. I have written an overview of them: I/O in the Arc language. This covers file I/O, string I/O, and the many operations to perform reads and writes. The operations strike me as very non-orthogonal; it's unpredictable which ones take ports, have defaults, or specify an eof value. I try to bring some organization to them.
Internals of places and setforms
The documentation continues with Internals of places and setforms. This continues where the assignment and places documentation left off. If you want to know how to create your own places and generalized variables in Arc, you're in luck.
Arc documentation table of contents
I've created a table of contents summarizing my documentation on the Arc language. (By request, it's now on the sidebar too.)
Arc assignment and places documentation
As part of my Arc language documentation series. I've created a page on assignment and places in Arc
Arc internals part 2: Macros
I've written a document on the internals of Arc's macro implementation. It continues where Arc internals part 1 left off.