4u

"for you";
used mainly over the internet, im, sms, etc.

i shall be waiting 4u in the club

by laicys November 7, 2007

4u-servers

A computer server in a rackmount enclosure/case that takes up four rack units of height. A rack unit is 1.75". I know this is UrbanDictionary.com, but that other definition about it being slang for a slow server is crap.

We have two 4U servers handling database tasks in our main data center rack.

by StackTrayce April 4, 2003