Apple Xserve Intel (Late 2006) - Manual (Page 55)

Appendix B Safety and Maintenance 55
 If feasible in the server location, use an adjustable chair that provides firm,
comfortable support. The back of the chair should support your lower back (lumbar
region). Follow the manufacturer’s instructions for adjusting the backrest to fit your
body properly.
 When using a keyboard at the server location, your shoulders should be relaxed. Your
upper arm and forearm should form an approximate right angle, with your wrist and
hand roughly in a straight line. Depending on the location of the display and
keyboard connected to the Xserve, you may have to adjust the height of your chair
so that you can maintain a comfortable position. Your feet should be flat on the floor
or on a footrest.