Append                         Open file, pointer at end of file
 Assign                         Assign filename string to FileVar
 BlockRead                      Hi speed read of untyped files
 BlockWrite                     Hi speed write of untyped files
 Chain                          Execute a Turbo .CHN file
 Close                          Close a disk file
 Eof                            Returns true if end of file reached
 Eoln                           Returns true if end of line reached
 Erase                          Erase disk file
 Execute                        Execute a child Turbo .COM program
 FilePos                        Current file position pointer
 FileSize                       Returns size of disk file
 Flush                          Force a write of sector buffer
 IOResult                       I/O operation return code
 LongFilePos                    Returns current file position pointer
 LongFileSize                   Returns current file size
 LongSeek                       Set file pointer to long value
 Overlay                        Multiple procedures in same address
 OvrPath                        Search path for overlays on disk
 Rename                         Rename disk file
 Reset                          Set file pointer to top of file
 Rewrite                        Prepare new disk file for use
 Seek                           Move disk file pointer (short)
 SeekEof                        Move disk file pointer to end of file
 SeekEoln                       Skip whitespace and test for line end