man pages section 2: System Calls
    
I
 
 I/O
  audit - audit ( Index Term Link )
  multiplexing - poll ( Index Term Link )
 
 initialize an LWP context - _lwp_makecontext ( Index Term Link )
 
 interprocess communication, - pipe ( Index Term Link )
 
 interval timer, get or set value of interval timer -- getitimer, setitimer ( Index Term Link )
 
 ioctl - control device ( Index Term Link )