plural of UP

Initialism of United Parcel Service.

(electronics) Initialism of uninterruptible power supply/source / Initialism of ultraviolet photoelectron spectroscopy. / (biochemistry) Initialism of ubiquitin-proteasome system.

Misspelling of oops.

(electronics, nonstandard) To connect a device to an uninterruptible power supply

plural of up

Third-person singular simple present indicative form of up

Alternative spelling of on the up-and-up

(informal) Legitimate; honest; upright.

plural of post-up