Coding theory 38 Congresses 10 Character sets (Data processing) 5 Cryptography 3 Data compression (Telecommunication) 3 Information theory 3 Data processing 2 Digital communications 2 Digital techniques 2 Error-correcting codes (Information theory) 2 Sequential machine theory 2 Signal processing 2 Statistical communication theory 2 Algebra 1 Bilinear systems 1 Binary system (Mathematics) 1 Block designs 1 Boundary value problems 1 Computational complexity 1 Computer algorithms 1 Control theory 1 Data transmission systems 1 Differential equations 1 Distance geometry 1 Geometry, Algebraic 1 Graph theory 1 History 1 Image processing 1 Metric spaces 1 Mobile communication systems 1