Abstract: One or more audio/video files are provided on a central server (203), accessible via a computer network. A audio/video file is requested by a user (205) and the file is transmitted to that user for viewing (207). The user enters edit point information specifying a portion of the previously-transmitted audio/video file relating to which the user wishes to make an annotation. The edit point information is received (209) by the central server over the computer network along with the textual annotation entered by the user. Use may be made of an optional rule that the edit point information must satisfy before it is accepted (211). The received edit point information and textual annotation are stored in an annotation data file (213). A subsequent user may request the annotation data file, which is transmitted to that user. The annotation text along with the relevant portion of the audio/vide file is then displayed for the requesting user.