to

(redirected from to and fro)
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(electricity)

to

(networking)
The country code for Tonga.

Heavily used for vanity domains because it looks like the English word "to".
References in classic literature ?
To and fro in the seven chambers there stalked, in fact, a multitude of dreams.
At every jump of the schooner, red-cap slipped to and fro, but--what was ghastly to behold--neither his attitude nor his fixed teeth-disclosing grin was anyway disturbed by this rough usage.
Losing patience at what appeared to me intolerable rudeness, I brought my mouth into a position full in front of her mouth so as to intercept her motion, and loudly repeated my question, "Woman, what signifies this concourse, and this strange and confused chirping, and this monotonous motion to and fro in one and the same Straight Line?
While Grandfather walked to and fro across the room, the imaginative boy was gazing at the historic chair.