I applied online. The process took 2 weeks. I interviewed at 3M in Sept 2014
Interview
quite easy going, technical questions were asked too. Felt at ease, although it's apparent the interns would not get a specific experience. Other wise it was fairly relaxed. Oddly, not much was asked about my background; only a few technical questions were asked, and the remainder of the time focused on describing the position and the department.
One to one interview with hiring manager, asked basic questions such as experience and goals. Overall, very pleasant, more interested in your interest and why you chose to go for the internship
Straight to the point. Interviewer was friendly. Interviewer screen through all applications resume which I felt was fair. Interviewer also hired based on past experience instead of grades which I'm greatful for.
Panel interview. The interview process was casual. Mostly generic questions asked like what made u choose this job, what do u plan to learn during your time here, have u applied to any companies aside from ours, reason for applying to those companies