👵 Old? 👴

I'm pretty old (44) but have no idea what that is.

Please send help.

EDIT: Just saw it 🐭

Not really. It wasn't that long ago they stopped making these.

I can guess what it is without Googling
The underside of an older computer mouse. They used a roller ball.

Kids used to steal them from the computer lab.

This reminds me of a old IBM memo concerning mouse balls.

MEMO
Re: Replacement of Mouse Balls.

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, 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.

I'm not sure if this real but it is funny!

I remember... *sigh

https://www.boredpanda.com/blog/wp-content/uploads/2020/05/old-computer-mouse-hack-1.jpg

I'm 57 and have no idea what this is??