On Tue, 15 Jul 2008 17:29:19 +0100, Doctor John <joh### [at] homecom> wrote:

>Stephen wrote:
>> On Tue, 15 Jul 2008 07:36:10 -0500, Mike Raiford <mra### [at] hotmailcom> wrote:
>> 
>>> (PID - Andrew should know what this means, Proportional, 
>>> Integral, Derivative ) 
>> 
>> Thank you I read it as "Piping & Instrumentation Diagram" 
>
>...and I read it as Prolapsed Intervertebral Disc
>
>JohLOL
-- 

Regards
     Stephen

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