This is a true IBM ordering information note from one of their catalogs.

This is an actual alert to the IBM Field Engineers that went out to

all IBM Branch Offices. The person who wrote it was very serious.

The rest found it to be pretty hilarious.

___________________________________________________________

Abstract: Mouse Balls available as FRU (Field Replacement Unit)

Mouse balls are now available as FRU. Therefore, if a mouse fails

to operate or should it perform erratically, it may need a ball

replacement. Because of the delicate nature of this procedure,

replacement of mouse balls should only be attempted by properly

trained personnel.

Before proceeding, determine the type of mouse balls by examining

the underside of the mouse. Domestic balls will be larger and harder

than foreign balls. Ball removal procedures differ depending upon

manufacturer of the mouse. Foreign balls can be replaced using the

opo-off method. Domestic balls are replaced using the twist-off

method. Mouse balls are not usually static sensitive. However,

excessive handling can result in sudden discharge. Upon completion

of ball replacement, the mouse may be used immediately.

It is recommended that each replacer have a pair of spare balls

for maintaining optimum customer satisfaction; and that any customer

missing his balls should suspect local personnel of removing these

necessary items.

To reorder, specify on the following:

P/N 33F8462 - Domestic Mouse Balls

P/N 33F8461 - Foreign Balls