25.1

Agilent Technologies, Elements of a Bar Code System, Application Note 1013, (1999). Available at http://www.semiconductor.agilent.com.

25.2

Dennon, Jack, Linux Reads Bar Codes, EL Jonline, March 2001. Available at http://www.linuxdevices.com.

25.3

Hewlett Packard (now Agilent Technologies), Low Current Bar Code Digitizer IC, Technical Data HBCC-0500, Document No. 5964 1563E, (October 1995). Contains a suggested circuit that is the basis for HP's A000 series wands.

25.4

Agilent Technologies, Low Current Digital Bar Code Wand Technical Data HBCS-A000 Series, Document No. 5964 6664E (November, 1999). Covers the type of wand used in this chapter. However, the pin connection data is not necessarily accurate.

25.5

Baker, John and Bauer, Wayne, The Mathematics of Barcodes, A Unit for Tech Prep Mathematics Courses, Mathematics Education Development Center, Indiana University (1999). Available at http://www.indiana.edu/ atmat/units/barcodes/barunit.htm.

25.6

Laurer, George, Questions Pertaining to the Code and Symbol Technology, (undated). Available at http://members.aol.com/productupc/techques.html. Mr. Laurer invented the UPC bar code in the early 1970's while at IBM.

25.7

Worth Data, Inc., Bar Code Primer (May 2003). Available at http://www.barcodehq.com.

25.8

Code 39 Barcode Specification (undated). Available at http://www.barcodeman.com/info/c39_1.php3

25.9

Thomas, Roger, Bar Codes Demystified, Electronics World (September 2001), reprinted at http://www.blackmarket-press.net/info/plastic/list_1.htm.

25.10

If you wish to look up information on a product based on its UPC-A code, try http://www.upcdatabase.com/.

25.10

By far the best of the freeware or shareware Code 3 of 9 fonts that I looked at is from IDAutomation. com, which makes available...