| QA1-939 Mathematics QA1-43 General QA47-59 Tables QA71-90 Instruments and machines QA75-76.95 Calculating machines QA75.5-76.95 Electronic computers. Computer science QA76.75-76.765 Computer software |
QA101-145 Elementary mathematics. Arithmetic QA150-272.5 Algebra QA273-280 Probabilities. Mathematical statistics QA299.6-433 Analysis QA440-699 Geometry. Trigonometry. Topology QA801-939 Analytic mechanics |