Following you can find links to all kinds of NS:CO Documentation, most of it being included with every download of NS:CO, while some are web-exclusives. The following documentation is essential if you want to understand the mechanics of NS:CO.

NS:CO Manual
This is the main manual that details all the aspects of NS:CO you need to know in order to utilize all of NS:CO's unique features.

NS:CO Quickstart Guide
This Quickstart Guide was written for those that just want to jump in and learn the game while they play. It contains only the most neccessary information.

NS:CO NSSL Scripting Guide
This is a guide that covers all the basics of the NSSL scripting language unique to NS:CO.

Browse the Documentation Folder
Take a look at the other, relatively short documents that each detail a different part of NS:CO.