92F99 None of the above, but in this section

93-XX Systems theory; control {For optimal control, see <a href="#code:49-XX">49-XX</a>}

93-00 General reference works (handbooks, dictionaries, bibliographies, etc.)

93-01 Instructional exposition (textbooks, tutorial papers, etc.)

93-02 Research exposition (monographs, survey articles)

93-03 Historical (must also be assigned at least one classification number from Section 01)

93-04 Explicit machine computation and programs (not the theory of computation or programming)

93-06 Proceedings, conferences, collections, etc.

93A30 Mathematical modeling (models of systems, model-matching, etc.)

93A99 None of the above, but in this section

93Bxx Controllability, observability, and system structure

93B15 Realizations from input-output data

93B51 Design techniques (robust design, computer-aided design, etc.)

93B99 None of the above, but in this section

93C15 Systems governed by ordinary differential equations [See also <a href="#code:34H05">34H05</a>]

93C20 Systems governed by partial differential equations

93C23 Systems governed by functional-differential equations [See also <a href="#code:34K35">34K35</a>]

93C30 Systems governed by functional relations other than differential equations (such as hybrid and switching systems)

93C41 Problems with incomplete information

93C70 Time-scale analysis and singular perturbations

93C83 Control problems involving computers (process control, etc.)

93C85 Automated systems (robots, etc.) [See also <a href="#code:68T40">68T40</a>, <a href="#code:70B15">70B15</a>, <a href="#code:70Q05">70Q05</a>]

93C99 None of the above, but in this section

93D05 Lyapunov and other classical stabilities (Lagrange, Poisson, $L^p, l^p$, etc.)

93D10 Popov-type stability of feedback systems

93D15 Stabilization of systems by feedback

93D30 Scalar and vector Lyapunov functions

93D99 None of the above, but in this section

93E10 Estimation and detection [See also <a href="#code:60G35">60G35</a>]

93E11 Filtering [See also <a href="#code:60G35">60G35</a>]