AIM is the global trade association for the Automatic Identification and Data Capture (AIDC) industry. Also provides details of the standards used for barcodes - most of which are available for purchase. http://www.aimusa.org/
Informative tutorial helps you understand UPC bar codes used on just about everything you buy, including how to decode the actual bars. http://www.howstuffworks.com/upc.htm
Offers label design, ERP and host connectivity, and RFID tag programming software. Also offers printer drivers and software samples. http://www.teklynx.com/
Offers products for creating, printing, and using barcodes, including books, fonts, RAM-resident software, function libraries and programs for creating artwork. http://www.mecsw.com/
European manufacturer of bar code readers and portable data collection terminals. Online product data sheets and case histories. http://www.datalogic.com/