A. This ...

A This is a correspondence shared between two colleagues in a workplace. B This is a memo which has an informal style expressed by the language used as well as the way of addressing the receiver. C Sue uses the memo to communicate Alan that she is going to do a brief introduction to the seminar and to ask him to set up the equipment she will need. D There is a form which must be filled in and sent to the Technical department in order to get the necessary equipment set up. E The seminar is being organized by Alan for his new colleagues and will be held the following month.