Short for Electronic Facsimilie.
It is a method of transmitting paper documents electronically.
The way it works is you feed the sheet of paper you want to send, into the fax machine. The machine then scans the document to produce an electronic data file.
The data file is then sent to another Fax machine by telephone line, which reads it. The machine will use the data to print out a simlar sheet to the original.
The handy thing about a Fax machine over email is that it can capture an image of a signature or a hand drawing.
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Click on this link: Fax