IA：IA
IC：IC
IR：IR
I2：I2
I-：I~-
In：Indium
IL：Interleukin(IL)
Ig：Ig
IP：IP
IM：IM
I期：phase I
IK：I_K
I型：type I
IF：IF
IQ：IQ
ID：ID
I帧：I frame
i值：the value of i
IT：IT
I形：I beam
IE：IE
IV：IV
IS：IS
IB：IB
IH：IH
I1：I1
I类：class I
IO：IO
I群：group I
i3：Internet Indirection Infrastrcture (i3)
IR谱：IR spectra
IPM：IPM
iDA：iDA
IIS：IIS
IE值：IE
IP核：IP Core
IF钢：IF steel
IFS：IFS
Ir粉：Ir powder
IPN：IPN
ICA：ICA
IgA：IgA
ICP：ICP-AES
IPC：IPC
ITO：ITO
ISA：ISA
ICS：ICS
ITS：Internal transcribed spacer
IDR：IDR
IMC：IMC