A collection of articles by leading experts in theoretical computer science, this volume commemorates the 75th birthday of Professor Rani Siromoney, one of the pioneers in the field in India. The articles span the vast range of areas that Professor Siromoney has worked in or influenced, including grammar systems, picture languages and new models of computation.Contents:Finite Array Automata and Regular Array Grammars (A Atanasiu et al.)Hexagonal Contextual Array P Systems (K S Dersanambika et al.)Contextual Array Grammars (R Freund et al.)A Cosmic Muse (T Head)Triangular Pasting System (T Kalyani et al.)Petri Nets, Event Structures and Algebra (K Lodaya)Anchored Concatenation of MSCs (M Mukund et al.)On Languages Defined by Numerical Parameters (A Salomaa)Digitalization of Kolam Patterns and Tactile Kolam Tools (S Nagata & R Thamburaj)Pollard's Rho Split Knowledge Scheme (M K Viswanath & K P Vidya)and other papersReadership: Researchers in computer science.