Mathematics
Defaults: IQ-6 and others.
This is the scientific study of quantities and magnitudes, and their relationships and attributes, through the use of numbers and symbols. You must specialize:
Applied: The branch of mathematics that interacts directly with the physical sciences and engineering, dealing with mathematical models of the behavior of physical systems. Defaults: Engineer (any)-5 or Physics-5.
Computer Science: The theoretical study of data structures and computation. Roll vs. skill to answer questions about what is possible with computers. This gives you no special ability to use computers! Default: Computer Programming-5.
Cryptology: The mathematical study of codes and ciphers. This gives you a theoretical understanding of encryption schemes, including how they change with TL and why some schemes are more effective than others. To create or break codes, use Cryptography skill. Default: Cryptography-5.
Pure: Generic "academic" mathematics. Make a skill roll to answer any math-related question not covered by another specialty. Pure mathematics encompasses dozens of obscure subfields that will never affect the game. If you must be an expert in something like "non-selfadjoint operator algebras," you may further note an optional specialty.
Statistics: The science of assembling and analyzing data for the purpose of calculating probabilities, constructing models, and making forecasts. Roll vs. skill to determine the odds of a particular outcome, given sufficient data about similar situations in the past.
Surveying: The science of determining the area of a portion of the Earth's surface, the lengths and directions of the bounding lines, and the contour of the surface. Make a skill roll to determine the dimensions of any area you can see. More complex determinations require specialized equipment. Defaults: Cartography-3 or Navigation (any)-4.
These specialties default to one another at -5.