OPEN - a file I/O statement that enables I/O to a file or device
Syntax
  OPEN file [FOR mode] [ACCESS access] [lock] AS [#]filenum [LEN=reclen]
    - file is a string expression that specifies an optional device name,
      followed by a file name or path name
    - mode is one of the following keywords:
 
RANDOM   Read or write from a random- | INPUT   Read only from sequential file
         access file (the default)    | OUTPUT  Write to a sequential file
BINARY   Read or write from a binary  | APPEND  Write to the end of a
         file                         |         sequential file
 
    - access and lock are <DETAILS> used only in a networking environment
    - filenum is an integer expression whose value is between 1 and 255
    - reclen defaults to 128 for random-access files, to 512 for sequential
      files, and is not needed at all for binary files
See Also  <FREEFILE>
Other Uses of the OPEN Keyword
  OPEN mode,[#]filenum,file[,reclen] - an alternate syntax (see <DETAILS>)
  <OPEN COM> - to open a communications channel