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Mark Stuart Day is Senior Scientist at Cisco Systems,
which he joined with Cisco's acquisition of SightPath.
He is co-chair of the Instant Messaging and Presence
Protocol working group in the IETF. Previously, he was
at Lotus, where his work contributed to both Lotus
Sametime and to the formation of the IMPP group. He
received his Ph.D. from MIT in 1995.
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