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Code 93

Everything you need to know.

Code 93
Mobile apps need to be increasingly more engaging to succeed. Manatee Works can help. Our mobile barcode scanner SDK is available on all major mobile development platforms.

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What is Code 93?

Code 93 (also known as Code 9/3, USS Code 93, or USS 93) was developed in 1982 by Intermec as a better alternative to Code 39.  The symbology can encode 47 different characters, including: uppercase A through Z; the digits 0 through 9; 7 symbol characters: space, period, minus sign, plus sign, dollar sign, slash, and the percent symbol; and several special characters including the start/stop symbol.  It includes support for encoding the full ASCII 128 characters set, though like its encoding in Code 39, it is not very efficient (i.e., it requires two symbols for each ASCII 128 character).  Code 93 is a variable length symbology, with no theoretical limit on code length.

Code 93 is a linear, or one-dimensional (1D) barcode.  This means the barcode is composed of a single set of varying width vertical lines and spaces.  The data in the barcode is represented linearly by these black/white patterns.  The minimum black/white width is called a module.  Below is a simple example.




Each character symbol in a Code 93 barcode is 9 modules wide and consists of 3 bars (black) and 3 spaces (white) (hence the name Code 93).  Each bar/space can have a width of 1 to 4 modules.  Both a start character and a stop character are used (the same symbol), and unlike Code 39, it includes a checksum: two characters, Checksum C and Checksum K, at the end of the data message, before the stop symbol.  The symbology is further characterized as a continuous barcode, meaning that each character is adjacent to the next with no inter-character gap element.  Here is our example again, diagramed for clarity:




Both checksum digits are computed as weighted modulo 47 values, with Checksum K including Checksum C in its computation.

Why use Code 93?

While Code 93 is widely supported with most commercial barcode scanners being capable of reading it, the symbology has not seen much adoption.  More capable and higher density symbologies, like Code 128, were already in use when it was introduced.  Since it uses two checksum digits, it is not as easy to generate and print as Code 39, the barcode it was designed to replace.

How is Code 93 used?

Code 93’s most common use is by the Canadian Post Office which uses it for supplemental delivery information.

How do we help developers using Code 93?

The Cognex Mobile Barcode Scanner SDK supports Code 93 detection, enabling developers to gather relevant workflow and application data. You can download the SDK for free by registering on the Cognex Mobile Barcode Developer Network. In addition, the Barcode Scanner SDK supports a broad range of symbologies to meet your growing development needs.

Barcode Scanner SDK Features and Capabilities

Developing practical applications is challenging. That’s why we've developed a straight-forward barcode scanner software development kit (SDK) that boasts the most powerful scanning experience available for integration. It offers developers a simple, flexible, dynamic decoding experience, while still allowing for maximum control and flexibility over the user experience (UX). The Cognex Mobile Barcode Scanner SDK was built BY developers FOR developers... with the goal of making all your applications practical.

As a tool developed with the automotive, retail, manufacturing, government, healthcare, commercial services, and transportation industries in mind, our scanning solutions are built around efficiency for the end-user, as well as simplicity for the application developer. We understand that the enterprise is continually looking for opportunities to increase efficiency. Therefore, we have developed the ultimate single-handed scanning solution aimed at maximizing every promise of a return on investment.
Mobile apps need to be increasingly more engaging to succeed. Manatee Works can help. Our mobile barcode scanner SDK is available on all major mobile development platforms.