Electronic record

Electronic records come in many forms: text documents, e-mails, Web pages, digital images, videotapes, maps, spreadsheets, presentations, audio files, charts, drawings, databases, satellite imagery, geographic information systems, and more. They may be complex digital objects that contain embedded images (still and moving), drawings, sounds, hyperlinks, or spreadsheets with computational formulas. Some portions of electronic records, such as the content of dynamic Web pages, are created on the fly from databases and exist only during the viewing session. Others, such as e-mail, may contain multiple attachments, and they may be threaded (that is, related e-mail messages are linked into send–reply chains).