For your convenience, here is a list of the websites referenced in the textbook:
http://www.mandarintools.com - Chinese Input Software (Free)
If you have a PC with Microsoft Word 97 or 2000, you can download a Chinese input macro. Look under the Chinese software heading and click the link for "Word 97 Chinese Input."
http://www.microsoft.com/windows/ie/downloads/recommended/ime/default.asp - Chinese Input Software (Free)
Here you can get Microsoft's Input Method Editor for Windows 2000, Windows XP, Office 2000 and Office XP.
http://www.njstar.com - Chinese Input
Software / Shareware, Windows PC only)
Here you can download a free demo version of NJ Communicator, which will allow you to read and write characters in programs such as web browsers, email, and Microsoft Word. You can also download a free demo version of
the NJ Chinese Word Processor, which will allow you to create Chinese documents without additional software.
http://lingua.mtsu.edu/chinese-computing/faq/pc.html - General information on inputting Chinese into Windows systems
http://lingua.mtsu.edu/chinese-computing/faq/mac.html - General information on inputting Chinese into Macintosh systems
http://humanum.arts.cuhk.edu.hk/Lexis/chifreq - A statistical Study of Chinese character frequency
Here you can find a comprehensive comparative study on Chinese character frequency conducted by the Chinese University of Hong Kong in 1992-1998. This most recent study offers trans-regional (Hong Kong, China, and Taiwan) and diachronic (1960s and 1980s-90s) surveys.