i: iron
I&M: Installation and Maintenance
I/O: Input/Output
IAA: Institute of Arbitrators Australia
IADB: infrastructure asset development branch
IAI: International Alliance for Interoperability
IAQ: internal air quality
IBC: Institute of Building Control
IBC: International Building Code
IBD: inhabitable building distance
IBDS: Integrated Building Design System
IBN: Institute Belge de Normalisation
IBV: Indicating Butterfly Valve
IC: inspection chamber
IC: integrated circuit
IC: internal combustion
IC: internal cooling
IC: interrupting capacity
ICAO: International Civil Aviation Organisation
ICARIS: Intelligent Commercial and Research Information Systems
ICBO: International Conference of Building Officials
ICC: intermediate cross connect
ICC: International Code Council
ICE: Institution of Civil Engineers
ICEC: International Cost Engineering Congress
ICES: Institution of Civil Engineering Surveyors
ICF: insulating concrete forms
ICOMOS: International Council on Monuments and Sites
ICT: Information and Communications Technology
ICV: improved capital value
ID: inside diameter
IDE: interface development environment
IDEF: Integrated Definition for Function Modelling
IDL: Interface Definition Language
IDM: information delivery manual
IDO: interim development order
IE: Information Engineering
IE: Invert Elevation
IEC: International Electrotechnical Commission
IED: integrated environmental design