What are the exchange's plans for Linux? For every new application, we talk about the possibility of using it on Linux because of all the good things that Linux brings to the party. These are the systems that historically came from the NYSE side of the overall NYSE Group. NYSE Arca, which used to be Archipelago, uses a lot of Sun hardware, with both Solaris and Linux.

Are you working with Linux source code yet? We haven't crossed that line yet and modified the source code for our own needs. We've thought about the advantages of doing it. But once you've done it, you've committed yourself to a support depth that you don't have to do if you build right off the shelf with Red Hat Linux or Sun Solaris.

What redundancy and fail-safe mechanisms do you have in place? The same ones that the NYSE has always used. We have two data centers in the major metro area. We run pairs of mirrored redundant hardware hot in both data centers, as well as local redundancy in each data center.

Will the exchange ever move fully to electronic trading? That's not what we are doing. It will be a mix of floor and electronic trading, and our customers will determine the percentage mix. Our goal is to offer systems that cater to the needs of our entire customer base. NYSE Arca is a purely electronic system that complements the hybrid model.

How will the pending merger of NYSE Group and the Euronext exchange affect IT operations? Since the end of summer, when everyone came back from vacation, we've gotten more diligent about getting down to details. The technologists from Euronext and those from NYSE are sitting down at regular meetings and taking inventory of what we have. We all know integration takes time. Things will run independently for a while. We have some financial targets to hit, which will drive some decisions. I like things simpler, with fewer moving parts.