Editing HorizonVirtual:Igtenio's Class Mods (section)

=== Additional Subjects ===
A Programmer can buy additional subjects for his library, but they do not automatically gain in Bonuses, like the major four Subjects(User Space, Program Space, Rewriting, and Codecrafting). Gaining an additional Subject costs <Current Number of Subjects>² X 500 RUs. Therefore, the first additional Subject would cost 8,000. This covers not only the cost of obtaining the Data, but of also upgrading the Partitioning and Compression of the Library to allow additional data. Added Subjects start at a +4, and can be increased in bonus for <Current Bonus> X 250 RUs. Thus, the first Upgrade would be 1,000 RUs. There is no limit to the number of Subjects a Library can contain, outside of the Financial limits.