IAs are graduate students with a mandate to be more involved with teaching (via tutorials). They also help with marking.
Instructional Support Assistants (ISAs aka tutors)
ISAs are undergraduate students hired to support the course full-time on their co-op work terms. They hold office hours, answer Piazza questions,
mark assignments and exams, etc.
TAs are CS graduate students that help with marking assignments and exams.
Course Coordinator
The course coordinator is responsible for the content and operation of
the course, within the parameters of the curriculum set out by the Undergraduate
Academic Plans Committee.