I Intensité

IBP Initial Boiling Point (liquids)

Ieff Intensité Efficace / Effective current

IHP Indicated Horse Power

Imax Intensité Maximum / Maximum current

IMGC Istituto di Metrologia Gustavo Colonnetti (IT, Torino)

Imin Intensité Minimum / Minimum current

IMS Israel Metrological Society

in Inch (1 inch = 2.54 centimeters)

in² Square inch / Pouce carré (1 sq. inch = 6.5 sq. cm)

in³ Cubic inch / Pouce cube (1 cubic inch = 16.3871 cubic centimeters)

in Hg Inch of mercury

ips Instructions per second

IR InfraRed

IT Intensité Totale / Total current

IU International Unit (same as UI)

IUAP International Union of Pure and Applied Physics

IERS International Earth Rotation Service / Service international de la rotation terrestre

IVM International Vocabulary of basic and general terms in Metrology (same as VIM)