Originally, the manuals of the VIRYA-1.04, the VIRYA-1.36 and the VIRYA-1.81 were divided into part 1 and part 2. This was done because the file of a complete manual was too large to put it on the website. However, at this moment, a new version of WordPress is used which allows files of 25 Mb. So now the complete manual is given in one file.