Content Comparison

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OS_In       read a character from standard input
OS_Tin      timed read a character from standard output
OS_Out      write a character to standard output
GN_Sop      OS_Sout     write a string to standard output
GN_Soe      OS_Bout     write a string at extended address to standard output
GN_Sip      fetch an input line using standard I/O
GN_Sdo      write date to standard output

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