From: "Geo" 

"Don Hills"  wrote in message
news:tEjTDtgaXyRI092yn{at}attglobal.net...

> Some of the odd restrictions I had to work under maintaining one
customer's
> 360 CPU with OEM memory.
>
> Why IBM replaced the 155 and 165 with the 158 and 168 as soon as they did.
>
> Why they had so many variants of one basic disk drive mechanism (the
2314).
>
> Why they dropped BSC protocol in favour of SDLC, and why they didn't just
> use HDLC.
>
> When I did my product training on NCP and VTAM, wondering why the
> functionality appeared to be non-optimally split between the units.

All things they don't do anymore?

Geo.

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