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Computer security trusted software and crime-free cyberspace.
Cybersecurity is essential for the developing digital world. Without it, individuals will suffer a wide range of undetected cybercrimes that will only lead to digital dictatorships.
Computers that provide digital security based on the theory of the Lambda Calculus provide the solution. Using a Church-Turing Machine private data is owned by individual citizens instead of software monopolies. The PP250 was the pioneering design for calibrated digital security based on mathematical symbols, encapsulated by capability limited addressing as object-oriented machine code. 
This introduction to the PP250 covers the Architecture of the PP250, the first computer compliant to the laws of the Church-Turing Thesis.