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In my software I am blocking printing to a file or any other devices, allowing only real printers?<br />
Most printers are printing to DOT4_001, one of the users send me an email complaining that his printer is not printing from my software. I dicovered that he is printing to port USB003.<br />
<br />
I tested it, if the computer has two printers (A) and (B)<br />
If the port for printer (A) is USB003 and changed to DOT4_001 port then printer (B) is receiving the print order.<br />
<br />
Why some printers use DOT4_001 and some uses USB003?<br />
is it necessary to have a port for each printer? or<br />
Is there away to make all printers print using DOT4_001? (one port)
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In my software I am blocking printing to a file or any other devices, allowing only real printers?
Most printers are printing to DOT4_001, one of the users send me an email complaining that his printer is not printing from my software. I dicovered that he is printing to port USB003.

I tested it, if the computer has two printers (A) and (B)
If the port for printer (A) is USB003 and changed to DOT4_001 port then printer (B) is receiving the print order.

Why some printers use DOT4_001 and some uses USB003?
is it necessary to have a port for each printer? or
Is there away to make all printers print using DOT4_001? (one port)

Printer Ports DOT4_001 and USB003

A printer is a peripheral which makes a persistent human readable representation of graphics or text on paper or similar physical media. Traditional printers are being used more for special purposes, like printing photographs or artwork, and are no longer a must-have peripheral; 3D printing has become an area of intense interest, allowing the creation of physical objects. An image scanner is a device that optically scans images, printed text, handwriting, or an object, and converts it to a digital image. Hand-held scanners, where the device is moved by hand, have evolved from text scanning "wands" to 3D scanners used for industrial design, reverse engineering, test and measurement, orthotics, gaming and other applications.

Printers and Scanners

Software is any set of instructions that directs a computer to perform specific tasks or operations. Computer software consists of programs, libraries and related non-executable data (such as documentation). Computer software is non-tangible, contrasted with computer hardware, which is the physical component of computers. Software written in a machine language is known as "machine code". However, in practice, software is usually written in high-level programming languages than machine language. High-level languages are translated into machine language using a compiler or interpreter or a combination of the two.