[willvarfar]

Interestingly, it seems they may have built their own master-master xml-based database. It's easy to guess that they didn't add an audit feature etc.

[mavhc]

They were using Riposte from https://www.eschergroup.com/riposte-platform/ and Oracle.

They were using dial up ISDN lines to send the data back, but Riposte didn't support that, or scale to 20k terminals, so that was all new code

In general they had a distributed database that couldn't do ACID

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