VT

(historical) Initialism of variable-time (WWII cover designation for the proximity fuse).

Abbreviation of Vermont: a state of the United States.

Initialism of ventricular tachycardia.

Initialism of videotape.

Initialism of vacuum tube (device that controls electric current flow in a high vacuum between electrodes to which an electric potential difference has been applied).

Abbreviation of vault.

Initialism of voice training.

(old-fashioned) Initialism of video terminal (device that connected to a computer server remotely, which had little computing power of its own; has been uncommon since the mid 1990s).

Initialism of voice-train.