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Regular Expressions
Regular Expressions in Perl
The UNIX "GREP" Utility
Mastering Regular Expressions
A Tao of Regular Expressions
Wikipedia Article on Regular Expressions
Finite Automata
Zero Counter Automaton
Parity Automata
Universal Automaton
Java Formal Languages and Automata Package
Protein Sequence Similarity Search Program
Context-Free Languages
Context-Free Grammar for Algol 60
Is Java Context-Free?
Python is not context-free
Haskell is not context-free
Mini-Java Grammar
Turing Machines
A Universal Turing Machine
References on the Busy Beaver Function
Turing Kara
Turing Kara manual in English
Busy Beaver Machines
Busy Beaver Machines
Simulation 1
Simulation 2
Simulation 3
Simulation a
Simulation r
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