XChat-Ruby is a plugin for the XChat IRC client which allows scripts to be written in the Ruby programming language. Almost all of the XChat2 plugin API is supported through a strong OO interface. Dynamic loading and unloading of Ruby modules is supported, as well as interactively executing Ruby statements from within XChat.
Hitchhiker's Guide to the Internet is a German introduction to the technical aspects of the Internet. This book explains both the low-level protocols IP, ICMP, TCP, and UDP and the high-level protocols SMTP, POP3, IMAP4, NNTP, HTTP, Gopher, FTP, IRC, DICT, Finger, Daytime, DNS, and Whois.