====== common server rack sizes ======

(or, "what's a U?")

^ Unit 	^ Dimension (W x H x D) ^
| 1U 	| 19" x 1.75" x 17.7"   |
| :::   | 19" x 1.75" x 19.7"   |
| :::   | 19" x 1.75" x 21.5"   |
| 2U 	| 19" x 3.5" x 17.7"    |
| :::   | 19" x 3.5" x 20.9"    |
| :::   | 19" x 3.5" x 24"      |
| 3U 	| 17.1" x 5.1" x 25.5"  |
| 4U 	| 19" x 7" x 17.8"      |
| :::   | 19" x 7" x 26.4"      |
| 5U 	| 19" x 8.34" x 19.67"  |
| :::   | 19.1" x 8.75" x 26.4" |
| 6U 	| 19" x 10.5" x 19.5"   |
| 7U 	| 17" x 12.2" x 19.8"   |