(military) Acronym of Improved homing-all-the-way killer, a type of missile.

(physics) Abbreviation of isotopic spin or isospin.

Abbreviation of within. / Initialism of with intent.

(signal processing, video compression) Abbreviation of intraframe. / (video games) abbreviation of invincibility frame, a single time unit in video games during which a character cannot be hurt.

Alternative form of i.e.

Alternative form of V.I.

(computer hardware, serial bus) Initialism of Inter-Integrated Circuit, a standard for integrated circuit communication using two lines.

Alternative spelling of I spy

Initialism of instead of.

Alternative form of PI