VI. Standard Procedures
Reading edition
Certain procedures are used without being declared. These include the standard functions listed in the Algol 60 report and the input-output and intermediate tape procedures. The complete list is as follows:
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ABS SIGN SQRT SIN COS ARCTAN LN EXP ENTIER EOF READERR WRITERR FORTRANF FTNF READ PAGE PRINT WRITE PUNCH INPUT OUTPUT BINREAD BINWRITE ENDFILE REWIND BACKUP FORTRAN FTN
These procedures are global to the program. They behave as though declared in a fictitious block surrounding the entire program.