Faxback service and web sites were also in operation. Exchanging views with other students. Faxing questions and answers. Using faxes to communicate with instead of the telephone. Discussing complicated equations, which are easier to write and fax to discuss than email.
Email necessitates the use of substitute symbols.
Social framework of the course needs developing. Use email because it is more efficient. Cheaper than using the telephone. Good for getting instant replies. Simple and cheaper to use than a PC, but have fewer facilities.