Essential health....

I'm told this was a real memo sent out by IBM to its employees in all
seriousness. It went to all field engineers about a computer
peripheral problem. The author of this memo was quite genuine.
The engineers rolled on the floor! Especially note the last couple of
sentences.

'If a mouse fails to operate or should it perform erratically, it may
need a ball replacement. Mouse balls are now available as FRU
(Field Replacement Units). Because of the delicate nature of this
procedure, a 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 the manufacturer
of the mouse. Foreign balls can be replaced using the pop off
method. Domestic balls are replaced by 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 person have a pair of
spare balls for maintaining optimum customer satisfaction.

Any customer missing his balls should contact the local personnel
in charge of removing and replacing these necessary items.

Please keep in mind that a customer without properly working balls
is an unhappy customer.'