Noah Mendelsohn

Professor of the Practice
Tufts University Department of Computer Science


I am on leave for Spring term 2020 and am not regularly on campus. Please email me if you need to reach me.

In Fall of 2020 I will teach COMP 117: Internet-Scale Distributed systems. That course was until 2017 numbered COMP 150-IDS. For quite a few years I taught the fall offerings of Comp 40: Machine Structure and Assembly Language Programming, but it seems unlikely that I will be doing so again in the near future..

Contacting me

Due to concerns about the COVID-19 virus I will rarely, if ever, be on campus this coming fall. The best way to reach me is via e-mail to I read that regularly, including when I am away from home or office.

When I return to campus my Tufts office will be:

Halligan Hall 214
161 College Ave
Medford, MA, 02155

I prefer e-mail whenever that's quick enough for you, but for cases where it's urgent that you speak to me, I have established a Google Voice number 617-506-3994 that you can call or text. When you call, it will ask your name, and then it will try ringing my mobile, my home, etc. Be patient, it can take a minute or so while it tries my phones.

Office hours

My office hours for Fall term of 2020 will be determined after I determine the preferences of my COMP 117 students. In any case, you are welcome to email me if you want to arrange to meet at some mutually convenient time. This term "meetings" will mostly be via video conference or phone, though I may occasionally arrange to meet students in person if a safe arrangement can be found.

Work outside of Tufts

Until summer of 2013 I was for several years the chair of the World Wide Web Consortium's Technical Architecture Group; the TAG is the senior steering committee responsible for the architectural integrity of the World Wide Web. I retired from IBM in 2010, and I hold the honorary title of IBM Distinguished Engineer Emeritus.

More information

Those of us who worked at W3C tend to find a lot of our specification drafts and e-mails posted publicly on the Web. That greatly increases our search karma so... if you do a Web search for my name, most of what comes back will indeed be about me. Other sources of information about my work, hobbies, etc. outside of Tufts can be found at:

The Web site includes my work history, a list of my publications and talks, and a page describing some CS papers that I particularly like.