Mathematical Sciences Classification System
94Axx - Communication, information
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                            94A05
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                            94A08Image processing (compression, reconstruction, etc.) [See also 68U10]
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                            94A11Application of orthogonal and other special functions
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                            94A12Signal theory (characterization, reconstruction, filtering, etc.)
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                            94A13Detection theory
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                            94A14Modulation and demodulation
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                            94A15
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                            94A17Measures of information, entropy
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                            94A20Sampling theory
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                            94A24Coding theorems (Shannon theory)
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                            94A29Source coding [See also 68P30]
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                            94A34Rate-distortion theory
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                            94A40Channel models (including quantum)
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                            94A45
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                            94A50Theory of questionnaires
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                            94A55Shift register sequences and sequences over finite alphabets
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                            94A60
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                            94A62Authentication and secret sharing [See also 81P94]
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                            94A99None of the above, but in this section