Noah Mendelsohn

Professor of the Practice
Tufts University Department of Computer Science


In Spring of 2018 I am teaching COMP 117: Internet-Scale Distributed systems. That course was until 2017 numbered COMP 150-IDS. In Fall of 2017 I taught Comp 40: Machine Structure and Assembly Language Programming.

Contacting me

The best way to reach me is via e-mail to I read that regularly, including when I am away from home or office.

My Tufts office is:

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

Temporary change: for the weeks starting 9/17 and 9/24 my office hours will be Tues/Thurs starting at about 4:30 (when I get back from 4:15 class). After that, I will resume the after COMP 40 class schedule described below. I finish teaching COMP 40 on Tuesdays and Thursdays at 2:45 in ASEAN Auditorium in the Cabot center. I will begin meeting with COMP 40 students there after class, and will make my way back to my office in Hallgan Hall, which is 214. Most days I should be back by 3:15 or so, and office hours will continue there until at least 4:15 PM. Some days I may also do office hours in the Halligan 116/118/120 labs if students want help with their code, so look for me there if I am not in my office. Please email me if you want to arrange to meet at some other time.

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.