OPEN

OPEN is used to open a file, COM(serial) or LPT port.

Open can use 5 different modes:

 OUTPUT: Creates a new file or erases an existing file for program output
 APPEND: Creates a new file or appends data output to an existing file
 BINARY: Creates a new file or uses input and output from an existing file
 RANDOM: Creates a new file or uses input and output from an existing file
 INPUT : Only reads input from an existing file