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Any program ever written could be rewritten using only the language features you have learned so far ( actually , you would need a few commands to control devices like the keyboard , mouse , disks , etc ., but that 's all ) . For example , you would need a secure channel from the encryption unit to the display to be able to display sensitive information without having some other malicious running software to intercept your information . To do that , however , you would need a fluid that works at much higher temperatures than our chilled acetone ( our current experiments are running at 0 degrees centigrade ) .