I
I/O
IS
IACSP
IAE
IAF
IAGS
IANA
IAOA
IAPA
IAPS
IARP
IAS
IASL
IASP
IATA
IAW
IB
IBAC
IBPS
IC
IC600
ICAA
ICAO
ICB
ICC
ICD
ICE NEEDLES
ICE STORM
ICM
ICMP
ICNIA
ICODE
ICON
ICOS
ICP
ICS
ICSS
ICU
ID
Id
IDC
IDE
ident
IDENT FEATURE
IDG
IDI
IDM
IDP
IDR
IDRP
IDS
IE
IEC
IED
IEEE
IEL
IEPR
IES
IESI
IETM
IF
IFA
IFALPA
IFATCA
IFE
IFF
IFOG
IFPS
IFR
IFR CONDITIONS
IFRB
IFS
IFSD
IFT
IFU
IGA
IGES
IGFER
IGIA
IGN
IGNITER
IGS
IGV
IIR
IIS
IL
ILM
ILS
IM
IMA
IMC
IME
IMG
IMI
IMM
IMO
IMP
IMPACT AREA
IMPACT BAG
IMPATT Diode
IMS
IMU
In
in.
In. Hg
in
in
INA
Inb
INBD
IND
INDEX
Indicated Altitude
INERTIAL GUIDANCE
INEWS
INFO
INFRARED
inHg
INHSEL
INI
INIT
INIT REF
Initial Approach Fix
INJ
INLAND SAR REGION
INM
INMARSAT
inop
inp
INPH
INS
INSERTION
INSOLATION
INST
INSTABILITY
instl
Instrument Flight Rules (IFR)
Instrument Landing System (ILS)
int
INTC
intcon
INTCP
INTEG
INTENSIVE STUDENT JET TRAINING AREA
INTERCOM
INTERFEROMETER
INTERROGATOR
INTERTROPICAL FRONT
intfc
intlk
intph
Intruder
Inu
Inverse Video
INVERSION
INX
IO
IOC
IOCI
IODC
IOI
IOM
ION
IONOSPHERE
IOR
IOS
IOT & E
IP
IPACG
IPB
IPC
IPD
IPI
IPL
IPM
IPR
IPS
IPT
IR
IRD
IRE
IRF
IRP
IRS
IRU
Irwr
ISA
ISC
ISDOS
ISIS
ISLN
ISO
ISOBAR
ISOTACH
ISOTHERM
ISP
ISPC
ISPDA
ISPS
ISQC
ISS
Isso-Contour
ISU
IT
ITA
ITEM
ITI
ITM
ITO
ITP
ITS
ITSE
ITT
ITT (T5)
ITU
ITWS
IU
IU/kg
IU/lb
IUE
IV
IVS
IVSI
Ix