access
admission
entrance
entree
entry
import
importation
importing
income
incoming
infiltration
ingoing
ingress
ingression
insertion
insinuation
intake
interpenetration
introduction
introgression
intrusion
leakage
penetration
percolation
reception
seepage
component
constituent
element
enter
infix
insert
introduce
sign
signal
signaling
inputs
inputted
inputting
output
circuit
data
filter
format
interface
measurement
module
monitor
parameter
sensor
source
terminal