Before the term

1. course advertisement, e.g., via catalog (broadcast of text).
2. course announcement: time, place, and instructor name (broadcast of text).
3. pre-enrollment counseling by student's advisor or by course instructor, approval required for enrollment (person-to-person).
4. payment (transfer of funds).
5. (late) enrollment, with certain provisions for dropping or changing grading basis (interactive data).
6. announcement of materials to be purchased, e.g., text books (broadcast of text).
7. purchase of texts, with certain provisions for refund (tranfer of funds and materials, e.g., mail order).
8. distribution of syllabus (broadcast of text).
9. announcement of professors phone number, e-mail address, office and office hours. (broadcast of text).
10. same for TA (broadcast of text).
11. announcement of policies: grading, cheating, laboratory, late homework, etc. (broadcast of text).
12. possible post-enrollment rejection, say for lack of pre-requisites (personal text, e.g., letter).