Barcode, is optical representation of the data that is readable by the computers, the coding represents the data in the Width areas (lines) and the spaces between the parallel lines, and we can call it codes or one-dimensional barcode.

Barcodes also come with patterns of dots or squares, hexagonal shapes, or other geometric patterns within images called code or two-dimensional matrix codes. Although binary systems uses symbols, more than lines (lines), but it is generally known as barcodes too. The first use of barcode was to put signs on train Carriages, but they were not commercially successful until they were used to automate (make automatic) sales systems of shopping malls, the task that made the barcodes become almost universal. Their use spread to other tasks as well, tasks are generally known as (AIDC) (Auto ID Data Capture). There are other systems that are trying to exaggerate the industry, of “capturing the identifier data automatically market (AIDC), but the simplicity and global fame for barcodes have limited the role of other systems, and it is used widely in various applications, in particular the ones that require speed in performance and you have a long serial number the you have difficulty in writing it by hand, and it is used in a shafi system in a lot of parts including:
1. In the Number of disease, where converts the patient's 12-digit number to the barcode According to the data, which programmed by this figure, it is impossible to repeat it, and instead of writing the patient's full name, among tens of thousands of names and search for them, using the barcode can read this number in parts of seconds.
2. In the number of the bill.
3. In the number of the employee.
4. In the number of the sample of the medical tests inside the lab.
5. in the number of blood bag inside the blood bank.
6. In the electronic archive (Document number)