I

I/O
   file [1] [2]
      binary
      text
   formatted [1] [2]
   image [1] [2] [3] [4]
      line
      section
   line by line
   mode
   pixel list
   stream
   table
   terminal
identifier
   mapping
if
iferr
image [1] [2]
   coordinates
   header
   I/O [1] [2] [3] [4]
   I/O line by line
   I/O
   line
   line I/O
   name
      template
   open
   parameter
   section
   template
imio [1] [2]
include [1] [2] [3]
include file
INDEF
indefinite
indentation
index
   array
initialization
inline functions
input
   formatted
integer
   decimal
internal format
intrinsic function [1] [2]