IBM Mouse Maintenance

I remember reading this in 1986 in my AP Computer Science class.
Enjoy!

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 This memo is from an unnamed computer company(IBM). It went to all field
engineers about a computer peripheral problem. The author of this memo
was quite serious. The engineers, however, rolled on the floor.

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Mouse balls are now available as FRU (Field Replacement Units).
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 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 replacer have a pair of spare balls for
maintaining optimum customer satisfaction. Any customer missing his
balls should suspect local personnel of removing these necessary
"items."