Note that all the pre-1991 station data comes from Phil Jones, and he maintains intellectual property rights over it. We should not change the data without his approval, or pass the data on to anyone else. The post-1991 data is free from restrictions.
There is also an index file to simplify finding a station given its name, country or position.
To speed up gridding, there is also a monthly file for each month since January 1850. Each file contains the temperatures from each station for one month.