CCD   Character Set
Charge Coupled Device. Type of bar code scanner that uses LEDs (not lasers) to flood the bar code with light.
 
Characters available for encodation in a particular bar code type. Not all bar code types can encode the entire ASCII character set.
 
Class 0   Class 1
Read-only tags (programmed only once) with 64-bit or 96-bit memory capacities. Class 0 tags operate in the UHF between 868 and 930 MHz. Class 0+ tags are rewritable.
 
One-time programmable (OTP) tags that can be updated one additional time after being encoded. Class 1 tags have a 96-bit memory capacity and operate between 868 and 930 MHz.
 
Clear Area   CODABAR
A clear space, containing no machine readable marks, which precedes the start character of a bar code field and follows the stop characters. Sometimes called the "clear area."
 
A numeric-only bar code type, in which each character is composed of seven elements four bars and three spaces. CODABAR is currently used in a variety of applications such as libraries, medicine, and overnight package delivery. Also known as USD-4 code, NW-7, and 2 of 7 code, it was originally developed for retail price-labeling use.
 
Code 39   Code 49
A full alphanumeric bar code type composed of five bars, four spaces, and an intercharacter gap for each character. Code 39 is the standard for many industries, including adoption by the U.S. Department of Defense for its LOGMARS specification. Also known as USD-3 code and 3 of 9 code, it is one of three symbologies identified in the ANSI standard MH10.8M-1983.
 
An extremely compact, multi-row, continuous variable bar code type capable of encoding the full 128 ASCII character set. It is ideally suited to applications where large amounts of data are required in a small space. The code consists of 2 to 8 rows. A row consists of a leading quiet zone, 4 symbol characters encoding 8 code characters, a stop pattern, and a trailing quiet zone. Rows are separated by a one module high separator bar. Each symbol character encodes two characters.
 
Code 128   Collision
A high density, variable length, full alphanumeric bar code type capable of encoding all 128 ASCII characters. It was designed for complex encoded product identification and is the basis of the UCC-128 marking specification. Code 128 has three subsets of characters. There are 106 printing characters in each set. Therefore, each character can have three different meanings, depending on the character subset used. Each Code 128 character consists of six elements -- three bars and three spaces.
 
Interference between more than one tag or reader.
 
Closed-loop Systems   Computer Integrated Manufacturing
Vertical market applications for RFID that never leave the company's control. Used for internal RFID applications such as security ID or tracking assets. Open standards are less of an issue under closed-loop systems. Closed loop RFID is effectively used for internal tracking and management of assets and can often bring a quick ROI.
 
Factory automation term where information is shared between computer aided design programs, materials resource planning (MRP) programs, and machine tools on the shop floor. Bar code data collection is an important part of a successful CIM implementation.
 
CPI   Cutter
Characters Per Inch. A common measurement for bar code density.
 
Also called a knife. An integrated mechanism used to cut individual tickets from a roll of tag supply.
 

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