Section and page numbers are from the text, Linear Algebra with Applications (second edition), by Gareth Williams.

Team A: Curve Fitting, Section 1.5
Team B: Electrical Networks, Section 1.5
Team C: Traffic Flow, Section 1.5
Team D: Seriation in Archaeology, Section 2.3
Team E: Cryptography, Section 2.4
Team F: Leontief Input-Output Model in Economics, Section 2.5
Team G: Stochastic Matrices: A Population Movement Model, Section 2.6
Team H: Communication Model and Group Relationships (Graph Theory), Section 2.7
Teams I and J: I don't recall!
Team K: Non-Euclidian Geometry and Special Relativity, Section 6.3
Team L: Coding Theory, Section 6.4 (pages 262-264)
Team M: Transformations in Computer Graphics, Section 7.2, pp. 285-287
Team N: Fractal Pictures of Nature, Section 7.2, pages 287-290
Team O: Solutions of Differential Equations, Section 7.4, pp. 311, 312
Team P: Demography and Weather Prediction (Markov Processes), Section 8.4

More topics:

Other Markov processes
Leslie matrices and models for population growth and resource harvesting
Other models for resource harvesting
Other applications of matrices in physics, chemistry, etc.
Many, many more!