I once worked at a site that had the red EPO button right next to a green
button of the exact same shape/size/design. The green button was there to
open the airlock doors which separated the machine room from the outside
world.

I can safely say that having two buttons side by side like that wasn't the
best design idea I've ever seen.

-----Original Message-----
From: IBM Mainframe Discussion List [mailto:[EMAIL PROTECTED] On Behalf
Of Gary D. Maxwell
Sent: Wednesday, September 19, 2007 7:01 PM
To: [email protected]
Subject: Re: JES2 or JES3, Which one is older?

> Don't forget, number one rule of third shift, always hang the machine room
> keyring on the red EPO button...

remember tape rings? horse shoes for raised floors!

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